Thermochemistry is a branch of chemistry that deals with the interrelation of heat with chemical reactions or with a physical change of state. Generally, thermochemistry is the application of thermodynamics to chemistry. Thermochemistry is also a synonym for chemical thermodynamics.

Overview

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The primary objective of chemical thermodynamics is the establishment of a criterion for the determination of the feasibility or spontaneity of a given transformation.Klotz, I. (1950). Chemical Thermodynamics (textbook). New York: Prentice-Hall, Inc. In this manner, thermochemistry is typically used to predict the energy exchanges that occur in the following processes:

1. chemical reactions
2. phase changes
3. the formation of solutions

Thermochemistry is primarily concerned with the following state functions defined in thermodynamics:

• Internal energy (U)
• Enthalpy (H).
• Entropy (S)
• Gibbs free energy (G)

Most identities in thermochemistry arise from application of the first law of thermodynamics, the law of conservation of energy, to these state functions.

See also

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• Important publications in thermochemistry
• Isodesmic reaction

References

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External links

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• Chemical Thermodynamics - University of North Carolina

Physical chemistry | thermochemistry

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