Study of Molecular Interaction in Ternary Liquid Mixture of an Aprotic Liquid Using Ultrasonic and Viscosity Probes

The ultrasonic velocity density and coefficient of viscosity of the ternary mixture of dimethyl acetamide, isobutyl methyl ketone and diethyl ether at frequencies 2MHz, 4MHz, 6MHz and 8MHz have been measured at temperature 308K. Adiabatic compressibility, intermolecular free length, free volume, internal pressure and their respective excess values have been computed for entire range of mole fraction and are interpreted to explain molecular interaction occurring in the liquid mixture. Relaxation time, excess enthalpy and absorption coefficient have been calculated and discussed. The negative excess values of coefficient of viscosity indicate the presence dispersion, induction and dipolar forces in ternary liquid mixture.The negative values of excess adiabatic compressibility, excess free length, excess free volume and excess enthalpy and the positive values of excess internal pressure indicate the presence of specific interactions in the ternary liquid mixture.