For 10 points, name this type of energy that is decreased in a spontaneous process.
Isothermal compressibility is a second derivative of this quantity and surface tension is equal to the change in this with respect to the change in surface area. This is equal to the sum over all the components of a systems of the product of moles and chemical potential. Unlike a similar quantity, it does account for pressure and volume. E raised to the ratio of this to the negative product of RT gives the equilibrium constant. It is equal to the enthalpy minus the product of temperature and pressure. For 10 points, name this type of energy that is decreased in a spontaneous process.
Isothermal compressibility is a second derivative of this quantity and surface tension is equal to the change in this with respect to the change in surface area.
{Gibbs} Free Energy