Application of two-parameter oscillating interaction potentials for specifying the thermophysical properties of simple liquids

For a statistical description of the equilibrium thermophysical properties of simple liquids, a family of two-parameter oscillating interaction potentials was used. The first-order phase transition was shown to take place in the systems with the model potentials. An analytic relation of the parameters of the potentials with the critical constants was established. The temperature dependences of some thermophysical properties along the line of the phase equilibrium and in the super-critical region $T>T_c$ were found. The findings were compared to experimental data.