Ultrasonic velocity and density data are utilized to estimate a number of important and useful thermodynamic properties of nine liquids (water, methyl alcohol, ethyl alcohol, n-propyl alconol, n-butyl alcohol, eugenol, carbon tetrachloride, n-hexane & toluene) as a function of pressure at different temperatures. The calculated properties include adiabatic compressibiliy (bs), isothermal compressibility (bT), thermal expansivity (a), heat capacity at constant pressure (Cp) and at constant volume (Cv) pseudo Gruneisen parameter (G), heat capacities ratio (g), energy of vaporization (DEvap), heat of vaporization (DHvap) and molecular radii (r) satisfactory agreement for all the properties has been found.