74-529: Dialectica is a quarterly philosophy journal founded in 1947 by Gaston Bachelard , Paul Bernays and Ferdinand Gonseth . It was published by Blackwell between 2004 and 2019. As of 2020, it is published in full open access and edited in Switzerland. It focuses on analytic philosophy and is the official journal of the European Society for Analytic Philosophy . This article about
148-440: A chemical equation . While in a non-nuclear chemical reaction the number and kind of atoms on both sides of the equation are equal, for a nuclear reaction this holds true only for the nuclear particles viz. protons and neutrons. The sequence of steps in which the reorganization of chemical bonds may be taking place in the course of a chemical reaction is called its mechanism . A chemical reaction can be envisioned to take place in
222-406: A philosophy journal is a stub . You can help Misplaced Pages by expanding it . See tips for writing articles about academic journals . Further suggestions might be found on the article's talk page . Gaston Bachelard Gaston Bachelard ( / b æ ʃ ə ˈ l ɑːr / ; French: [baʃlaʁ] ; 27 June 1884 – 16 October 1962) was a French philosopher . He made contributions in
296-467: A chemical reaction is said to have occurred. A chemical reaction is therefore a concept related to the "reaction" of a substance when it comes in close contact with another, whether as a mixture or a solution ; exposure to some form of energy, or both. It results in some energy exchange between the constituents of the reaction as well as with the system environment, which may be designed vessels—often laboratory glassware . Chemical reactions can result in
370-470: A chemical transformation is the rearrangement of electrons in the chemical bonds between atoms. It can be symbolically depicted through a chemical equation , which usually involves atoms as subjects. The number of atoms on the left and the right in the equation for a chemical transformation is equal. (When the number of atoms on either side is unequal, the transformation is referred to as a nuclear reaction or radioactive decay .) The type of chemical reactions
444-412: A dense core called the atomic nucleus surrounded by a space occupied by an electron cloud . The nucleus is made up of positively charged protons and uncharged neutrons (together called nucleons ), while the electron cloud consists of negatively charged electrons which orbit the nucleus. In a neutral atom, the negatively charged electrons balance out the positive charge of the protons. The nucleus
518-535: A directed beam in a vacuum in a mass spectrometer . Charged polyatomic collections residing in solids (for example, common sulfate or nitrate ions) are generally not considered "molecules" in chemistry. Some molecules contain one or more unpaired electrons, creating radicals . Most radicals are comparatively reactive, but some, such as nitric oxide (NO) can be stable. The "inert" or noble gas elements ( helium , neon , argon , krypton , xenon and radon ) are composed of lone atoms as their smallest discrete unit, but
592-614: A job in October as a professor of physics and chemistry at the college of Bar-sur-Aube . At the age of thirty-six he began a completely unexpected philosophical career. Starting decisively in 1922, he acquired the title of Doctor of Letters at the Sorbonne in 1927. His theses, supported by Abel Rey and Léon Brunschvicg , were published. He became a lecturer at the Faculty of Letters of Dijon from October 1927, but remained at
666-490: A larger framework. Bachelard never saw how seemingly irrational theories often simply represented a drastic shift in scientific perspective. For instance, he never claimed that the theory of probabilities was just another way of complexifying reality through a deepening of rationality (even though critics like Lord Kelvin found this theory irrational). One of his main theses in The New Scientific Mind
740-411: A number of steps, each of which may have a different speed. Many reaction intermediates with variable stability can thus be envisaged during the course of a reaction. Reaction mechanisms are proposed to explain the kinetics and the relative product mix of a reaction. Many physical chemists specialize in exploring and proposing the mechanisms of various chemical reactions. Several empirical rules, like
814-424: A particular substance per volume of solution , and is commonly reported in mol/ dm . In addition to the specific chemical properties that distinguish different chemical classifications, chemicals can exist in several phases. For the most part, the chemical classifications are independent of these bulk phase classifications; however, some more exotic phases are incompatible with certain chemical properties. A phase
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#1732772677100888-405: A pure chemical substance that has its unique set of chemical properties, that is, its potential to undergo a certain set of chemical reactions with other substances. However, this definition only works well for substances that are composed of molecules, which is not true of many substances (see below). Molecules are typically a set of atoms bound together by covalent bonds , such that the structure
962-609: A substance may undergo and the energy changes that may accompany it are constrained by certain basic rules, known as chemical laws . Energy and entropy considerations are invariably important in almost all chemical studies. Chemical substances are classified in terms of their structure , phase, as well as their chemical compositions . They can be analyzed using the tools of chemical analysis , e.g. spectroscopy and chromatography . Scientists engaged in chemical research are known as chemists . Most chemists specialize in one or more sub-disciplines. Several concepts are essential for
1036-414: Is a pure substance which is composed of a single type of atom, characterized by its particular number of protons in the nuclei of its atoms, known as the atomic number and represented by the symbol Z . The mass number is the sum of the number of protons and neutrons in a nucleus. Although all the nuclei of all atoms belonging to one element will have the same atomic number, they may not necessarily have
1110-409: Is a set of states of a chemical system that have similar bulk structural properties, over a range of conditions, such as pressure or temperature . Physical properties, such as density and refractive index tend to fall within values characteristic of the phase. The phase of matter is defined by the phase transition , which is when energy put into or taken out of the system goes into rearranging
1184-586: Is a very useful means for predicting the feasibility of a reaction and determining the state of equilibrium of a chemical reaction, in chemical thermodynamics . A reaction is feasible only if the total change in the Gibbs free energy is negative, Δ G ≤ 0 {\displaystyle \Delta G\leq 0\,} ; if it is equal to zero the chemical reaction is said to be at equilibrium . There exist only limited possible states of energy for electrons, atoms and molecules. These are determined by
1258-422: Is also possible to define analogs in two-dimensional systems, which has received attention for its relevance to systems in biology . Atoms sticking together in molecules or crystals are said to be bonded with one another. A chemical bond may be visualized as the multipole balance between the positive charges in the nuclei and the negative charges oscillating about them. More than simple attraction and repulsion,
1332-439: Is also used to identify the composition of remote objects – like stars and distant galaxies – by analyzing their radiation spectra. The term chemical energy is often used to indicate the potential of a chemical substance to undergo a transformation through a chemical reaction or to transform other chemical substances. When a chemical substance is transformed as a result of its interaction with another substance or with energy,
1406-436: Is an object of scientific thought… an example of an abstract-concrete object." To understand the way it works, one has to take the detour of scientific knowledge. Epistemology is thus not a general philosophy that aims at justifying scientific reasoning. Instead, it produces regional histories of science . In addition to epistemology, Bachelard's work deals with many other topics, including poetry, dreams, psychoanalysis , and
1480-464: Is called a mixture. Examples of mixtures are air and alloys . The mole is a unit of measurement that denotes an amount of substance (also called chemical amount). One mole is defined to contain exactly 6.022 140 76 × 10 particles ( atoms , molecules , ions , or electrons ), where the number of particles per mole is known as the Avogadro constant . Molar concentration is the amount of
1554-523: Is composed of gaseous matter that has been completely ionized, usually through high temperature. A substance can often be classified as an acid or a base . There are several different theories which explain acid–base behavior. The simplest is Arrhenius theory , which states that acid is a substance that produces hydronium ions when it is dissolved in water, and a base is one that produces hydroxide ions when dissolved in water. According to Brønsted–Lowry acid–base theory , acids are substances that donate
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#17327726771001628-472: Is dense; the mass of a nucleon is approximately 1,836 times that of an electron, yet the radius of an atom is about 10,000 times that of its nucleus. The atom is also the smallest entity that can be envisaged to retain the chemical properties of the element, such as electronegativity , ionization potential , preferred oxidation state (s), coordination number , and preferred types of bonds to form (e.g., metallic , ionic , covalent ). A chemical element
1702-485: Is developed by his student Gilbert Durand . His works include: Though most of Bachelard's major works on poetics have been translated into English, only about half of his works on the philosophy of science have been translated. Bachelard influenced many subsequent French philosophers, among them Michel Foucault , Louis Althusser , Dominique Lecourt and Jacques Derrida , as well as the sociologists Pierre Bourdieu and Bruno Latour . Chemistry Chemistry
1776-464: Is electrically neutral and all valence electrons are paired with other electrons either in bonds or in lone pairs . Thus, molecules exist as electrically neutral units, unlike ions. When this rule is broken, giving the "molecule" a charge, the result is sometimes named a molecular ion or a polyatomic ion. However, the discrete and separate nature of the molecular concept usually requires that molecular ions be present only in well-separated form, such as
1850-645: Is formed and how environmental pollutants are degraded ( ecology ), the properties of the soil on the Moon ( cosmochemistry ), how medications work ( pharmacology ), and how to collect DNA evidence at a crime scene ( forensics ). Chemistry has existed under various names since ancient times. It has evolved, and now chemistry encompasses various areas of specialisation, or subdisciplines, that continue to increase in number and interrelate to create further interdisciplinary fields of study. The applications of various fields of chemistry are used frequently for economic purposes in
1924-537: Is more easily transferred between substances relative to light or other forms of electronic energy. For example, ultraviolet electromagnetic radiation is not transferred with as much efficacy from one substance to another as thermal or electrical energy. The existence of characteristic energy levels for different chemical substances is useful for their identification by the analysis of spectral lines . Different kinds of spectra are often used in chemical spectroscopy , e.g. IR , microwave , NMR , ESR , etc. Spectroscopy
1998-468: Is the crystal structure , or arrangement, of the atoms. Another phase commonly encountered in the study of chemistry is the aqueous phase, which is the state of substances dissolved in aqueous solution (that is, in water). Less familiar phases include plasmas , Bose–Einstein condensates and fermionic condensates and the paramagnetic and ferromagnetic phases of magnetic materials. While most familiar phases deal with three-dimensional systems, it
2072-458: Is the quantum mechanical model . Traditional chemistry starts with the study of elementary particles , atoms , molecules , substances , metals , crystals and other aggregates of matter . Matter can be studied in solid, liquid, gas and plasma states , in isolation or in combination. The interactions, reactions and transformations that are studied in chemistry are usually the result of interactions between atoms, leading to rearrangements of
2146-507: Is the probability of a molecule to have energy greater than or equal to E at the given temperature T. This exponential dependence of a reaction rate on temperature is known as the Arrhenius equation . The activation energy necessary for a chemical reaction to occur can be in the form of heat, light, electricity or mechanical force in the form of ultrasound . A related concept free energy , which also incorporates entropy considerations,
2220-453: Is the scientific study of the properties and behavior of matter . It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms , molecules and ions : their composition, structure, properties, behavior and the changes they undergo during reactions with other substances . Chemistry also addresses the nature of chemical bonds in chemical compounds . In
2294-514: Is therefore not primitive, but built (VI, 2). These themes led Bachelard to support a sort of constructivist epistemology . Bachelard was a rationalist in the Cartesian sense, although he recommended his "non-Cartesian epistemology" as a replacement for the more standard Cartesian epistemology. He compared "scientific knowledge" to ordinary knowledge in the way we deal with it, and saw error as only illusion: "Scientifically, one thinks truth as
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2368-507: Is thus impossible to examine an immobile thing, which was precisely the condition for knowledge according to the classical theory of knowledge (Becoming being impossible to be known, in accordance with Aristotle and Plato 's theories of knowledge ). In non-Cartesian epistemology, there is no "simple substance" as in Cartesianism , but only complex objects built by theories and experiments and continuously improved (VI, 4). Intuition
2442-526: Is useful in identifying periodic trends . A compound is a pure chemical substance composed of more than one element. The properties of a compound bear little similarity to those of its elements. The standard nomenclature of compounds is set by the International Union of Pure and Applied Chemistry (IUPAC). Organic compounds are named according to the organic nomenclature system. The names for inorganic compounds are created according to
2516-660: The University of Paris . On 25 August 1937 he was made a Knight of the Legion of Honor . He became a professor at the Sorbonne from 1940 to 1954. He held the chair of the history and philosophy of science, where he succeeded Abel Rey, director of the Institute of History and Philosophy of Science and Technology (IHST), which in 1992 became IHPST. When he was appointed to the Sorbonne as a university professor and director of
2590-509: The Woodward–Hoffmann rules often come in handy while proposing a mechanism for a chemical reaction. According to the IUPAC gold book, a chemical reaction is "a process that results in the interconversion of chemical species." Accordingly, a chemical reaction may be an elementary reaction or a stepwise reaction . An additional caveat is made, in that this definition includes cases where
2664-455: The chemical bonds which hold atoms together. Such behaviors are studied in a chemistry laboratory . The chemistry laboratory stereotypically uses various forms of laboratory glassware . However glassware is not central to chemistry, and a great deal of experimental (as well as applied/industrial) chemistry is done without it. A chemical reaction is a transformation of some substances into one or more different substances. The basis of such
2738-493: The chemical industry . The word chemistry comes from a modification during the Renaissance of the word alchemy , which referred to an earlier set of practices that encompassed elements of chemistry, metallurgy , philosophy , astrology , astronomy , mysticism , and medicine . Alchemy is often associated with the quest to turn lead or other base metals into gold, though alchemists were also interested in many of
2812-469: The duet rule , and in this way they are reaching the electron configuration of the noble gas helium , which has two electrons in its outer shell. Similarly, theories from classical physics can be used to predict many ionic structures. With more complicated compounds, such as metal complexes , valence bond theory is less applicable and alternative approaches, such as the molecular orbital theory, are generally used. See diagram on electronic orbitals. In
2886-434: The imagination . The Psychoanalysis of Fire (1938) and The Poetics of Space (1958) are among the most popular of his works: Jean-Paul Sartre cites the former and Bachelard's Water and Dreams in his Being and Nothingness (1943), and the latter had a wide reception in architectural theory circles, and continues to be influential in literary theory and creative writing. In philosophy, this nocturnal side of his work
2960-510: The inorganic nomenclature system. When a compound has more than one component, then they are divided into two classes, the electropositive and the electronegative components. In addition the Chemical Abstracts Service has devised a method to index chemical substances. In this scheme each chemical substance is identifiable by a number known as its CAS registry number . A molecule is the smallest indivisible portion of
3034-500: The interconversion of conformers is experimentally observable. Such detectable chemical reactions normally involve sets of molecular entities as indicated by this definition, but it is often conceptually convenient to use the term also for changes involving single molecular entities (i.e. 'microscopic chemical events'). An ion is a charged species, an atom or a molecule, that has lost or gained one or more electrons. When an atom loses an electron and thus has more protons than electrons,
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3108-529: The intermolecular forces of a substance are such that the energy of the surroundings is not sufficient to overcome them, it occurs in a more ordered phase like liquid or solid as is the case with water (H 2 O); a liquid at room temperature because its molecules are bound by hydrogen bonds . Whereas hydrogen sulfide (H 2 S) is a gas at room temperature and standard pressure, as its molecules are bound by weaker dipole–dipole interactions . The transfer of energy from one chemical substance to another depends on
3182-400: The scientific object should be constructed and therefore different from the positivist sciences ; in other words, information is in continuous construction. Empiricism and rationalism are not regarded as dualism or opposition but complementary, therefore studies of a priori and a posteriori , or in other words reason and dialectic , are part of scientific research. Bachelard
3256-438: The size of energy quanta emitted from one substance. However, heat energy is often transferred more easily from almost any substance to another because the phonons responsible for vibrational and rotational energy levels in a substance have much less energy than photons invoked for the electronic energy transfer. Thus, because vibrational and rotational energy levels are more closely spaced than electronic energy levels, heat
3330-541: The Institute for the History of Science and Technology in 1940, he accompanied his daughter in her higher educations. In 1958, he became a member of the Royal Academy of Science, Letters and Fine Arts of Belgium . Bachelard married Jeanne Rossi, a schoolteacher, in 1914. She was transferred to Voigny . His daughter Suzanne was born on 18 October. He travelled the six kilometers to Bar-sur-Aube on foot every day,
3404-515: The Valence Shell Electron Pair Repulsion model ( VSEPR ), and the concept of oxidation number can be used to explain molecular structure and composition. An ionic bond is formed when a metal loses one or more of its electrons, becoming a positively charged cation, and the electrons are then gained by the non-metal atom, becoming a negatively charged anion. The two oppositely charged ions attract one another, and
3478-494: The atom is a positively charged ion or cation . When an atom gains an electron and thus has more electrons than protons, the atom is a negatively charged ion or anion . Cations and anions can form a crystalline lattice of neutral salts , such as the Na and Cl ions forming sodium chloride , or NaCl. Examples of polyatomic ions that do not split up during acid–base reactions are hydroxide (OH ) and phosphate (PO 4 ). Plasma
3552-561: The college of Sézanne , but turned away from teaching to consider a career in telegraphy . Literary by training, he took the technological path before moving towards science and mathematics . In particular, he was fascinated by the great discoveries of the end of the 19th century and the beginning of the 20th century ( radioactivity , quantum and wave mechanics , relativity , electromagnetism and wireless telegraphy ). Discharged in March 1919 and unemployed, Bachelard searched and obtained
3626-412: The college of Bar-sur-Aube until 1930. He even participated in the municipal elections of 1929 to defend the project of a college for all. He nevertheless accepted a professorship at the University of Burgundy when his daughter Suzanne entered the second degree. from 1930 to 1940 he was a professor at the University of Dijon and then was appointed chair in the history and philosophy of science at
3700-412: The context of chemistry, energy is an attribute of a substance as a consequence of its atomic , molecular or aggregate structure . Since a chemical transformation is accompanied by a change in one or more of these kinds of structures, it is invariably accompanied by an increase or decrease of energy of the substances involved. Some energy is transferred between the surroundings and the reactants of
3774-476: The discontinuity at work in the history of sciences. However the term "epistemological break" itself is almost never used by Bachelard but became famous through Louis Althusser . He showed that new theories integrated old theories in new paradigms , changing the sense of concepts (for instance, the concept of mass , used by Newton and Einstein in two different senses). Thus, non-Euclidean geometry did not contradict Euclidean geometry , but integrated it into
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#17327726771003848-429: The energies and distributions characterize the availability of an electron to bond to another atom. The chemical bond can be a covalent bond , an ionic bond , a hydrogen bond or just because of Van der Waals force . Each of these kinds of bonds is ascribed to some potential. These potentials create the interactions which hold atoms together in molecules or crystals . In many simple compounds, valence bond theory ,
3922-444: The fields of poetics and the philosophy of science . To the latter, he introduced the concepts of epistemological obstacle and epistemological break ( obstacle épistémologique and rupture épistémologique ). He influenced many subsequent French philosophers, among them Michel Foucault , Louis Althusser , Dominique Lecourt and Jacques Derrida , as well as the sociologists Pierre Bourdieu and Bruno Latour . For Bachelard,
3996-444: The formation or dissociation of molecules, that is, molecules breaking apart to form two or more molecules or rearrangement of atoms within or across molecules. Chemical reactions usually involve the making or breaking of chemical bonds. Oxidation, reduction , dissociation , acid–base neutralization and molecular rearrangement are some examples of common chemical reactions. A chemical reaction can be symbolically depicted through
4070-425: The historical rectification of a persistent error, and experiments as correctives for an initial, common illusion ( illusion première )." The role of epistemology is to show the history of the (scientific) production of concepts . Those concepts are not just theoretical propositions: they are simultaneously abstract and concrete , pervading technical and pedagogical activity. This explains why "The electric bulb
4144-542: The history and philosophy of science in such works as Le nouvel esprit scientifique ("The New Scientific Spirit", 1934) and La formation de l'esprit scientifique ("The Formation of the Scientific Mind", 1938) were based on his vision of historical epistemology as a kind of psychoanalysis of the scientific mind. In the English-speaking world , the connection Bachelard made between psychology and
4218-547: The history of science has been little understood. Bachelard demonstrated how the progress of science could be blocked by certain types of mental patterns, creating the concept of obstacle épistémologique ("epistemological obstacle"). One task of epistemology is to make clear the mental patterns at use in science, in order to help scientists overcome the obstacles to knowledge. Another goal is to “give back to human reason its function of agitation and aggressiveness” as Bachelard put it in ‘L'engagement rationaliste’ (1972). Bachelard
4292-445: The ionic bond is the electrostatic force of attraction between them. For example, sodium (Na), a metal, loses one electron to become an Na cation while chlorine (Cl), a non-metal, gains this electron to become Cl . The ions are held together due to electrostatic attraction, and that compound sodium chloride (NaCl), or common table salt, is formed. In a covalent bond, one or more pairs of valence electrons are shared by two atoms:
4366-473: The main characteristics of a molecule is its geometry often called its structure . While the structure of diatomic, triatomic or tetra-atomic molecules may be trivial, (linear, angular pyramidal etc.) the structure of polyatomic molecules, that are constituted of more than six atoms (of several elements) can be crucial for its chemical nature. A chemical substance is a kind of matter with a definite composition and set of properties . A collection of substances
4440-419: The other isolated chemical elements consist of either molecules or networks of atoms bonded to each other in some way. Identifiable molecules compose familiar substances such as water, air, and many organic compounds like alcohol, sugar, gasoline, and the various pharmaceuticals . However, not all substances or chemical compounds consist of discrete molecules, and indeed most of the solid substances that make up
4514-631: The questions of modern chemistry. The modern word alchemy in turn is derived from the Arabic word al-kīmīā ( الكیمیاء ). This may have Egyptian origins since al-kīmīā is derived from the Ancient Greek χημία , which is in turn derived from the word Kemet , which is the ancient name of Egypt in the Egyptian language. Alternately, al-kīmīā may derive from χημεία 'cast together'. The current model of atomic structure
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#17327726771004588-478: The reaction absorbs heat from the surroundings. Chemical reactions are invariably not possible unless the reactants surmount an energy barrier known as the activation energy . The speed of a chemical reaction (at given temperature T) is related to the activation energy E, by the Boltzmann's population factor e − E / k T {\displaystyle e^{-E/kT}} – that
4662-433: The reaction in the form of heat or light ; thus the products of a reaction may have more or less energy than the reactants. A reaction is said to be exergonic if the final state is lower on the energy scale than the initial state; in the case of endergonic reactions the situation is the reverse. A reaction is said to be exothermic if the reaction releases heat to the surroundings; in the case of endothermic reactions ,
4736-544: The resulting electrically neutral group of bonded atoms is termed a molecule . Atoms will share valence electrons in such a way as to create a noble gas electron configuration (eight electrons in their outermost shell) for each atom. Atoms that tend to combine in such a way that they each have eight electrons in their valence shell are said to follow the octet rule . However, some elements like hydrogen and lithium need only two electrons in their outermost shell to attain this stable configuration; these atoms are said to follow
4810-403: The rules of quantum mechanics , which require quantization of energy of a bound system. The atoms/molecules in a higher energy state are said to be excited. The molecules/atoms of substance in an excited energy state are often much more reactive; that is, more amenable to chemical reactions. The phase of a substance is invariably determined by its energy and the energy of its surroundings. When
4884-474: The same mass number; atoms of an element which have different mass numbers are known as isotopes . For example, all atoms with 6 protons in their nuclei are atoms of the chemical element carbon , but atoms of carbon may have mass numbers of 12 or 13. The standard presentation of the chemical elements is in the periodic table , which orders elements by atomic number. The periodic table is arranged in groups , or columns, and periods , or rows. The periodic table
4958-408: The scope of its subject, chemistry occupies an intermediate position between physics and biology . It is sometimes called the central science because it provides a foundation for understanding both basic and applied scientific disciplines at a fundamental level. For example, chemistry explains aspects of plant growth ( botany ), the formation of igneous rocks ( geology ), how atmospheric ozone
5032-645: The solid crust, mantle, and core of the Earth are chemical compounds without molecules. These other types of substances, such as ionic compounds and network solids , are organized in such a way as to lack the existence of identifiable molecules per se . Instead, these substances are discussed in terms of formula units or unit cells as the smallest repeating structure within the substance. Examples of such substances are mineral salts (such as table salt ), solids like carbon and diamond, metals, and familiar silica and silicate minerals such as quartz and granite. One of
5106-695: The structure of the system, instead of changing the bulk conditions. Sometimes the distinction between phases can be continuous instead of having a discrete boundary' in this case the matter is considered to be in a supercritical state. When three states meet based on the conditions, it is known as a triple point and since this is invariant, it is a convenient way to define a set of conditions. The most familiar examples of phases are solids , liquids , and gases . Many substances exhibit multiple solid phases. For example, there are three phases of solid iron (alpha, gamma, and delta) that vary based on temperature and pressure. A principal difference between solid phases
5180-421: The study of chemistry; some of them are: In chemistry, matter is defined as anything that has rest mass and volume (it takes up space) and is made up of particles . The particles that make up matter have rest mass as well – not all particles have rest mass, such as the photon . Matter can be a pure chemical substance or a mixture of substances. The atom is the basic unit of chemistry. It consists of
5254-664: Was born in Bar-sur-Aube , France in 1884. He was a postal clerk in Bar-sur-Aube, and then studied physics and chemistry before finally becoming interested in philosophy . To obtain his doctorate ( doctorat ès lettres ) in 1927, he wrote two theses: the main one, Essai sur la connaissance approchée , under the direction of Abel Rey , and the complementary one, Étude sur l'évolution d'un problème de physique: la propagation thermique dans les solides , supervised by Léon Brunschvicg . He first taught from 1902 to 1903 at
5328-470: Was critical of Auguste Comte 's positivism , which considered science as a continual progress . To Bachelard, scientific developments such as Einstein's theory of relativity demonstrated the discontinuous nature of the history of sciences . Thus models that framed scientific development as continuous, such as that of Comte and Émile Meyerson , seemed simplistic and erroneous to Bachelard. Through his concept of "epistemological break", Bachelard underlined
5402-657: Was provided a very useful education, and enrolled for a philosophy degree. Jeanne died in June 1920, and Bachelard raised his daughter alone. Despite the gender role expectations at the time, Bachelard showed great concern in supporting his daughter's development into an academic career. Counter to stereotypes, he wanted to make his daughter, Suzanne, a scholar. Suzanne became a mathematician and philosopher involved in phenomenological and epistemological research of high standing. In 1962, he died in Paris . Bachelard's studies of
5476-484: Was that modern sciences had replaced the classical ontology of the substance with an "ontology of relations", which could be assimilated to something like a process philosophy . For instance, the physical concepts of matter and rays correspond, according to him, to the metaphysical concepts of the thing and of movement; but whereas classical philosophy considered both as distinct, and the thing as ontologically real, modern science can not distinguish matter from rays. It
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