Gibbs–Helmholtz equation
The Gibbs–Helmholtz
equation is a thermodynamic equation used for calculating changes in
the Gibbs
free energy of
a system as a function of temperature. It was originally presented in an
1882 paper entitled Die Thermodynamik chemischer Vorgange by Hermann
von Helmholtz. It
describes how the Gibbs free energy, which was presented originally by Josiah
Willard Gibbs,
varies with temperature. It is typically applicable to chemical reactions of
the body.
The
equation is-
(∂ΔG/∂T)P = - ΔH/T2
Where H is the enthalpy, T the absolute temperature and G the Gibbs free energy of the system, all at constant pressure p.
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