Temperature and Composition Dependence of Thermo-Physical Properties of Glycerol-Water Mixture

Temperature dependent physical properties such as ultrasound velocity, density, compressibility and the molar volume are measured for different compositions of water-glycerol mixture. These data are further used to investigate the excess velocity (C^xs), excess adiabatic compressibility (κ_S^xs) and the excess molar volume (V^xs). C^xs at room temperature is found to be positive and exhibits maximum around the concentration of glycerol, x_g≈0.65. C^xs depends strongly on temperature and even becomes negative in the dilute limit of concentration at a temperature, 60°C. κ_S^xs is negative exhibiting maxima at room temperature. The excess volume is found to be positive. These results have been used to analyze the surface properties as well as the nature of interaction between molecules in the mixture.