RELATIONSHIP BETWEEN THE MOLECULAR-CONSTANT, ISOTHERMAL VOLUME DERIVATIVE OF THERMODYNAMIC GRUNEISEN-PARAMETER, NONLINEARITY PARAMETER AND INTERMOLECULAR FORCES IN LIQUIDS

The isochoric temperature derivative of sound velocity, Beyer's nonlinearity parameter, the isothermal volume derivatives of thermodynamic Gruneisen parameter and isochoric heat capacity and the repulsive exponent of intermolecular potential are shown to be related to the molecular constant representing the ratio of internal pressure to cohesive pressure of liquids. The calculated values are reasonably satisfactory and explain the experimental results on sound propagation data of liquids. The results have been used to develop further understanding of the significance of molecular constant, fractional free volume and repulsive exponent of intermolecular potential in describing various thermoacoustic and nonlinear properties and the anharmonic behaviour with regard to molecular order and intermolecular interactions in liquids.