Simultaneous presentation of VLE, HE and cpE by the PRSV equation of state with the modified van der Waals one-fluid and Huron–Vidal–Orbey–Sandler mixing rules

The Stryjek–Vera modification of the Peng–Robinson equation of state with two parameter van der Waals one-fluid mixing rule suggested by Schwartzentruber and Renon (SR) and the Orbey–Sandler modification of the Huron–Vidal mixing rule (HVOS) was applied for simultaneous description of vapor–liquid equilibrium (VLE), excess enthalpy (HE) and excess heat capacity (cpE) data (VLE+HE, HE+cpE, VLE+cpE and VLE+HE+cpE). The HVOS mixing rule coupled with the NRTL equation using the temperature dependent parameters with six optimized coefficients gave mostly satisfactory results for simultaneous fitting of VLE+HE, VLE+cpE, HE+cpE and VLE+HE+cpE data of the non-ideal binary systems diverse complexity.