Equation of State of Gaussian Molecules

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Abstract
The equation of state of Gaussian molecules is calculated by three methods: Padé extrapolation based on the known virial coefficients; solution of the Percus–Yevick (PY) theory and a self-consistent generalization of the PY theory; and a perturbation treatment based on hard spheres. With the exception of the PY compressibility isotherm, the results of these methods are in close agreement and should provide very good approximations to the, as yet unknown, exact results for this system at high densities.