For 10  points, name this thermodynamic measure of disorder.
One equation for this quantity demonstrates that it is proportional to the logarithm of the internal energy density and provides a valid approximation of this quantity for monatomic ideal gases. In addition to being calculated by the Sackur-Tetrode equation, this quantity is equal to the negative partial derivative of Gibbs free energy with respect to temperature. This quantity is also given by Boltzmann's constant multiplied by the logarithm of the number of microstates, and the third law of thermodynamics gives its value at absolute zero to be 0 for a perfect crystal. For 10  points, name this thermodynamic measure of disorder.
One equation for this quantity demonstrates that it is proportional to the logarithm of the internal energy density and provides a valid approximation of this quantity for monatomic ideal gases.
entropy