Study of molecular interactions using excess thermo-acoustical parameters at different temperatures

Ultrasonic velocities, densities and viscosities have been measured in two binary liquid mixtures of quinoline with alkanols (ethanol and 1-propanol) over the entire molefraction range of quinoline at temperatures T = (303.15, 308.15, 313.15 and 318.15)K. From the experimentally measured data, excess thermo-acoustical parameters such as excess intermolecular freelength (LfE), excess adiabatic compressibility (βE), excess free volume (VfE), excess internal pressure (πE),excess enthalpy (HE) and excess Gibb's free energy of activation function (G⁎E) have been calculated. These results are fitted to the Redlich-Kister polynomial equation and have been explained on the basis of intermolecular interactions present between the component molecules of the liquid mixtures.