Solid State Density in Equations of State for Fluids

(Received 20 April 1994, revised 5 July 1995, accepted 18 January 1996)

Abstract
The correlation between the density of a substance at the critical point and in the solid state is examined in view of the amazing empirical feature that the ratio between the above two densities is a constant for most substances. This universal feature offers a new criterion for assessing some improved versions of van der Waals equation of state for fluids.