Isothermal volume derivative of thermodynamic Gruneisen parameter, nonlinearity parameter and intermolecular heat capacity of liquids

Abstract
The isochoric temperature derivative of Sound Velocity, the isothermal volume derivative of thermodynamic Gruneisen parameter, fractional free (available) volume and the repulsive exponent of intermolecular potential are shown to be related to the microscopic Gruneisen parameter and Beyer's nonlinearity parameter of the liquid. The intermolecular contributions to the heat capacity and the adiabatic bulk modulus have been evaluated from the relationship between the microscopic and thermodynamic Gruneisen parameter, using thermo - acoustic data. The results have been used to develop further understanding of the significance of fractional free volume, repulsive exponent of intermolecular potential and the Gruneisen parameter in describing thermo-acoustic and nonlinear properties and the anharmonic behaviour with regard to molecular order and intermolecular interactions in liquids.