Abstract
A new pseudocubic perturbed hard-sphere equation of state is proposed combining the hard-sphere expression of Carnahan and Starling and the empirical cubic form for apparent volume. The present equation of state is successfully applied to the saturated properties of pure substances including polar components. Given temperature and pressure, the proposed equation of state has at most three real roots for the volume, similar to the conventional cubic equations of state. All parameters in the present equation of state can be evaluated from the critical constants, normal boiling point, dipole moment and reduced temperature. The proposed equation of state strictly satisfies the critical point requirements.
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