The equation ˆ†GT, P = ˆ†H – Tˆ†S is known as Gibbs Helmholtz equation and it is used for predicting the spontaneity of a process.
Following are the applications of the Gibbs-Helmholtz equation:
- Used in the calculation of the change in enthalpy using the change in Gibbs energy when the temperature is varied at constant pressure.
- Used in the calculation of the change in enthalpy for a reaction with temperature other than 298K.
- Used in the calculation of the effect of temperature change on the equilibrium constant.