This state property is the only one which explicitly does not follow Gibbs' theorem.
This state property is the only one which explicitly does not follow Gibbs' theorem. In an Otto cycle, there are two isentropic steps and two steps where this quantity remains constant. The slope of a coexistence curve equals the difference in entropy divided by the difference in this quantity for the two phases, according to the Clapeyron equation. Both terms of the van der Waals equation have this quantity in the (*) denominator. When this state variable is held constant, heat added to the system equals the change in internal energy, such as in a bomb calorimeter. This quantity is proportional to temperature and inversely proportional to pressure for ideal gases. For 10 points, name this quantity which is measured in liters.
This state property is the only one which explicitly does not follow Gibbs' theorem.
molar volume