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Thermochemistry

Index Thermochemistry

Thermochemistry is the study of the heat energy associated with chemical reactions and/or physical transformations. [1]

49 relations: Adiabatic process, Antoine Lavoisier, Balloon, Boiling, Calorie, Calorimeter, Calorimetry, Chemical change, Chemical reaction, Closed system, Cryochemistry, Differential scanning calorimetry, Endothermic process, Enthalpy, Entropy, Exothermic process, First law of thermodynamics, Germain Henri Hess, Gustav Kirchhoff, Hans Peter Jørgen Julius Thomsen, Heat, Heat capacity, Heat of combustion, Hess's law, Isobaric process, Isodesmic reaction, Isolated system, Isothermal process, Joseph Black, Keith J. Laidler, Latent heat, Mechanically isolated system, Melting, Peter Atkins, Photoelectron photoion coincidence spectroscopy, Pierre-Simon Laplace, Piston, Principle of maximum work, Reaction calorimeter, Standard enthalpy of formation, Surroundings, System, Thermally isolated system, Thermocouple, Thermodynamic databases for pure substances, Thermodynamic free energy, Thermodynamics, Thermometer, Thomsen–Berthelot principle.

Adiabatic process

In thermodynamics, an adiabatic process is one that occurs without transfer of heat or matter between a thermodynamic system and its surroundings.

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Antoine Lavoisier

Antoine-Laurent de Lavoisier (also Antoine Lavoisier after the French Revolution;; 26 August 17438 May 1794) CNRS (Centre National de la Recherche Scientifique) was a French nobleman and chemist who was central to the 18th-century chemical revolution and who had a large influence on both the history of chemistry and the history of biology.

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Balloon

A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, air or water.

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Boiling

Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere.

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Calorie

A calorie is a unit of energy.

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Calorimeter

A calorimeter is an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity.

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Calorimetry

Calorimetry is the science or act of measuring changes in state variables of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints.

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Chemical change

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.

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Chemical reaction

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

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Closed system

A closed system is a physical system that does not allow certain types of transfers (such as transfer of mass and energy transfer) in or out of the system.

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Cryochemistry

Cryochemistry is the study of chemical interactions at temperatures below.

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Differential scanning calorimetry

Differential scanning calorimetry, or DSC, is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature.

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Endothermic process

The term endothermic process describes the process or reaction in which the system absorbs energy from its surroundings, usually in the form of heat.

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Enthalpy

Enthalpy is a property of a thermodynamic system.

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Entropy

In statistical mechanics, entropy is an extensive property of a thermodynamic system.

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Exothermic process

In thermodynamics, the term exothermic process (exo-: "outside") describes a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e.g. a battery), or sound (e.g. explosion heard when burning hydrogen).

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First law of thermodynamics

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems.

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Germain Henri Hess

Germain Henri Hess (Герман Иванович Гесс German Ivanovich Gess; 7 August 1802 – 30 November 1850) was a Swiss-Russian chemist and doctor who formulated Hess's law, an early principle of thermochemistry.

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Gustav Kirchhoff

Gustav Robert Kirchhoff (12 March 1824 – 17 October 1887) was a German physicist who contributed to the fundamental understanding of electrical circuits, spectroscopy, and the emission of black-body radiation by heated objects.

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Hans Peter Jørgen Julius Thomsen

Hans Peter Jørgen Julius Thomsen (16 February 1826 – 13 February 1909) was a Danish chemist noted in thermochemistry for the Thomsen–Berthelot principle.

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Heat

In thermodynamics, heat is energy transferred from one system to another as a result of thermal interactions.

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Heat capacity

Heat capacity or thermal capacity is a measurable physical quantity equal to the ratio of the heat added to (or removed from) an object to the resulting temperature change.

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Heat of combustion

The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it.

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Hess's law

Hess' law of constant heat summation, also known as Hess' law (or Hess's law), is a relationship in physical chemistry named after Germain Hess, a Swiss-born Russian chemist and physician who published it in 1840.

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Isobaric process

An isobaric process is a thermodynamic process in which the pressure stays constant: ΔP.

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Isodesmic reaction

An isodesmic reaction is a chemical reaction in which the type of chemical bonds broken in the reactant are the same as the type of bonds formed in the reaction product.

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Isolated system

In physical science, an isolated system is either of the following.

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Isothermal process

An isothermal process is a change of a system, in which the temperature remains constant: ΔT.

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Joseph Black

Joseph Black FRSE FRCPE FPSG (16 April 1728 – 6 December 1799) was a Scottish physician and chemist, known for his discoveries of magnesium, latent heat, specific heat, and carbon dioxide.

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Keith J. Laidler

Keith James Laidler (January 3, 1916 – August 26, 2003), born in England, was notable as a pioneer in chemical kinetics and authority on the physical chemistry of enzymes.

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Latent heat

Latent heat is thermal energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process — usually a first-order phase transition.

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Mechanically isolated system

In thermodynamics, a mechanically isolated system is a system that is mechanically constraint to disallow deformations, so that it cannot perform any work on its environment.

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Melting

Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid.

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Peter Atkins

Peter William Atkins (born 10 August 1940) is an English chemist and former Professor of Chemistry at the University of Oxford and a Fellow of Lincoln College.

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Photoelectron photoion coincidence spectroscopy

Photoelectron photoion coincidence spectroscopy (PEPICO) is a combination of photoionization mass spectrometry and photoelectron spectroscopy.

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Pierre-Simon Laplace

Pierre-Simon, marquis de Laplace (23 March 1749 – 5 March 1827) was a French scholar whose work was important to the development of mathematics, statistics, physics and astronomy.

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Piston

A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms.

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Principle of maximum work

In the history of science, the principle of maximum work was a postulate concerning the relationship between chemical reactions, heat evolution, and the potential work produced there from.

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Reaction calorimeter

A reaction calorimeter is a calorimeter that measures the amount of energy released (exothermic) or absorbed (endothermic) by a chemical reaction.

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Standard enthalpy of formation

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

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Surroundings

Surroundings are the area around a given physical or geographical point or place.

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System

A system is a regularly interacting or interdependent group of items forming an integrated whole.

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Thermally isolated system

In thermodynamics, a thermally isolated system can exchange no mass or heat energy with its environment.The internal energy of a thermally isolated system may therefore change due to the exchange of work energy.

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Thermocouple

A thermocouple is an electrical device consisting of two dissimilar electrical conductors forming electrical junctions at differing temperatures.

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Thermodynamic databases for pure substances

Thermodynamic databases contain information about thermodynamic properties for substances, the most important being enthalpy, entropy, and Gibbs free energy.

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Thermodynamic free energy

The thermodynamic free energy is the amount of work that a thermodynamic system can perform.

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Thermodynamics

Thermodynamics is the branch of physics concerned with heat and temperature and their relation to energy and work.

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Thermometer

A thermometer is a device that measures temperature or a temperature gradient.

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Thomsen–Berthelot principle

In thermochemistry, the Thomsen–Berthelot principle is a hypothesis in the history of chemistry which argued that all chemical changes are accompanied by the production of heat and that processes which occur will be ones in which the most heat is produced.

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Redirects here:

History of thermochemistry, Molecular thermodynamics, Thermochemical.

References

[1] https://en.wikipedia.org/wiki/Thermochemistry

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