For an ideal gas, allowing this quantity to change increases the heat capacity by R.
This is the only quantity that serves as a natural variable for each of the microcanonical, canonical and grand canonical ensembles. This quantity raised to the polytropic index, then multiplied by its conjugate, is equal to a constant for a polytropic process. For an ideal gas, allowing this quantity to change increases the heat capacity by R. This quantity can be accounted for by applying a hard sphere potential to the virial equation of state, which is a power series that expands the reciprocal of this quantity. This quantity and (*) temperature are held constant when using the Helmholtz free energy. Since this quantity is the conjugate of pressure, work done by a gas can be expressed as the integral of pressure with respect to this value. For 10 points, name this quantity that is measured in cubic meters.
This is the only quantity that serves as a natural variable for each of the microcanonical, canonical and grand canonical ensembles.
volume [prompt on V] 