Abstract
Abstract Based on theoretical results for hard-dipolar spheres and the computer simulation data for n-butane a new equation of state is applied to the correlation of thermodynamic properties for ten pure polar and nonpolar fluids: methane, ethane, n-butane, water, ammonia, carbon dioxide, acetonitrile, ethanol, methanol and acetone. The reference system has the same dependence on density as that given by the Carnahan-Starling equation, but the coefficients are function of temperature through the reduced dipole moment. The effect of attractive forces is taken into account through an empirical function which contains two universal constants whose values are fixed by fitting computer simulation data for n-butane. For polar fluids, the equation gives results significantly better than those obtained from conventional cubic equations of state, when using the same limited experimental data for determining equation of state parameters.
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