On the behaviour of thermo-acoustic parameters in different liquids

The thermo-acoustical parameters of liquids are evaluated in terms of the coefficient of thermal expansion on the assumption that the Moelwyn-Hughes parameter is the dominant factor. The Moelwyn-Hughes parameter has been utilized to establish some simple relations between the lattice Gruneisen parameter, Beyer's nonlinearity parameter, Rao's acoustical parameter, Sharma's thermo-acoustical parameter, the fractional available volume, the repulsive exponent of intermolecular potential, the Anderson-Gruneisen parameter and the molecular constant. A relationship between the isothermal, isochoric and isobaric Gruneisen parameters has also been studied. The parameter Y (compressibility) is found to be close to 0.09 from which one may infer that the normal modes of vibrations contributing to heat capacities are very small. Sharma's parameter has been found to be approximately constant in the case of liquids studied.