Gibbs-Helmholtz equation

English

Etymology

Named after Hermann von Helmholtz (who introduced it in an 1882 paper) and Josiah Willard Gibbs.

Proper noun

1. Template:Lb An equation for calculating changes in the Gibbs free energy of a system as a function of temperature: ${\left(\frac{\partial \left(\frac{G}{T}\right)}{\partial T}\right)}_p=-\frac{H}{T^2},$ where H is the enthalpy, T the absolute temperature and G the Gibbs free energy of the system, all at constant pressure p.