The differential of this quantity equals TdS plus VdP.
Dividing this quantity by Avogadro's number to the one third times molar volume to the two thirds and multipliying by a steric coefficient gives specific surface energy according to Stefan's formula. This quantity is on the y-axis of a Mollier diagram, where it is plotted against entropy. This quantity is divided by the square of the temperature on the right side of the Gibbs-Helmholtz equation, which relates it to Gibbs free energy. The differential of this quantity equals TdS plus VdP. This quantity equals internal energy plus pressure times volume. Only the change in this quantity can actually be measured. For 10 points, name this quantity, a state function computed using Hess's Law.
Dividing this quantity by Avogadro's number to the one third times molar volume to the two thirds and multipliying by a steric coefficient gives specific surface energy according to Stefan's formula.
enthalpy