Cubic equation of state models for liquid excess heat capacity calculations. II. Applicability of the PRSV-SR and PRSV-HVOS models to complex binary mixtures

Abstract

Binary liquid excess heat capacities C-p(E) for various kinds of complex binary systems measured by Conti and coworkers are well represented by the PRSV EOS modified van der Waals one fluid mixing rule proposed by Schwartzentruber and Renon (SR) and the Orbey-Sandler modification of the Huron-Vidal mixing rules (HVOS). The HVOS mixing rule is used with the NRTL excess free energy model. The binary parameters of both models (PRSV-SR and PRSV-HVOS) were assumed to be linear functions of temperature. Only for the system ethanol-cyclohexane the correlation obtained by the PRSV-SR model is not satisfactory.