For 10 points, name this quantity which always increases according to the second law of thermodynamics, a measure of disorder in a system.
Relaxation in spin glasses has been shown to be consistent with the Tsallis type of this quantity. This quantity is wrongly predicted to go to minus infinity at absolute zero by the Sackur-Tetrode equation. The partial derivative of the Helmholtz Energy with respect to temperature is minus one times this quantity. On a phase diagram, the gradient of a phase boundary is equal to the ratio of the molar changes in this quantity and volume. For 10 points, name this quantity which always increases according to the second law of thermodynamics, a measure of disorder in a system.
Relaxation in spin glasses has been shown to be consistent with the Tsallis type of this quantity.
{Entropy}