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