In one form, this equation is stated as the derivative of pressure with respect to temperature equals latent heat over temperature times change in specific volume.
A correction to this equation scales one variable as the normalized temperature to the 0.38 power; that correction relaxes the assumption that one quantity in this equation is temperature-independent and that correction is named for Watson. The August-Roche-Magnus formula is used to correct this formula when the saturation vapor pressure is temperature dependent. This equation is derived by noting that the chemical potential is equal across a (*) phase boundary, then applying the Gibbs-Duhem relation. In one form, this equation is stated as the derivative of pressure with respect to temperature equals latent heat over temperature times change in specific volume. For 10 points, name this doubly eponymous equation used to find the slope of coexistence curves.
A correction to this equation scales one variable as the normalized temperature to the 0.38 power; that correction relaxes the assumption that one quantity in this equation is temperature-independent and that correction is named for Watson.
Clausius-Clapeyron relation