Abstract
Like the van der Waals and Redlich-Kwong equations, the Cubic Chain-of-Rotators (CCOR) equation of state is a perturbation type of equation expressing pressure as a difference between repulsive and attractive pressures. Unlike the previous cubic equations the repulsive pressure of the CCOR equation expresses the molecular dynamics results of hard spheres and the rotational contribution of polyatomic molecules. For non-polar fluids the equation is generalized in the form of corresponding states. For polar fluids specific values of the equation constants are determined for 45 substances. The equation accurately represents the vapor pressure of non-polar and polar fluids and the saturated liquid density of non-polar fluids. Vapor-liquid equilibrium of non-polar and polar fluid mixtures is described at pressures from the ambient up to elevated pressures. The cross interaction parameters change significantly with temperature for some high pressure polar mixtures.
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