May low-density expansions for imperfect gases contain information about condensed phases?

Abstract

The question posed is examined within the context of two simple models, the Ford problem and the van der Waals equation, both of which possess two phases: (i) a low-density phase for which all the virial coefficients in the density power-series expansion are known and (ii) a high-density condensed phase. Padé extrapolation techniques are applied to the virial series in an attempt to predict the condensed phase branch. © 1984 American Institute of Physics.