Bardic V. Investigation of intermolecular potential functional form on a base of equation of state.

The dissertation is devoted to the study of widely used intermolecular potential model corresponding to repulsive forces. Statistical mechanics grounded equations of state were used to investigate intermolecular parameters on a base of experimental thermodynamic data for dense gases, liquids and gas binary mixtures. Processing of experimental data analysis reveals the temperature dependence of the steepness parameter for dense gases and concentration dependence for this parameter in a case of binary gas mixtures. It was explained the necessity of a pressure logarithmic correction to the steepness parameter for liquids and sensebility to nonadditive effects of intermolecular interactions. It was shown also that the steepness paramemter in the bracket of “soft” sphere model is individual for concrete substance and dependent on aggregate state of matter.