Calculations of the thermodynamic characteristics of liquid hydrocarbons based on intermolecular interaction potentials

The internal energies, the virial pressures, and the chemical potentials of C-2-C-4 saturated hydrocarbons were calculated with the use of the RISM integral equations. Two sets of Lennard-Jones potential parameters for force centers were considered. Potential parameters providing an acceptable accuracy of calculations of various thermodynamic characteristics were suggested. The results obtained in calculations of liquid-vapor equilibria for one- and two-component hydrocarbon systems are reported.