c	cohesive energy density
cP	molar isobaric heat capacity
cV	molar isochoric heat capacity
cV 0	ideal-gas molar isochoric heat capacity
P	pressure
P int	internal pressure [= (∂u/∂v)T]
T	temperature
u	molar internal energy
u 0	ideal-gas molar internal energy
V	volume
v	molar volume