Molecular interaction in ternary liquid mixtures at different frequencies

Abstract

The density, viscosity and ultrasonic velocity are measured in ternary mixtures of N,Ndimethylformamide, toluene and cyclohexane at different frequencies such as 1 MHz, 4 MHz, 6 MHz, and 8 MHz over the entire composition range. From these experimental values various parameters like adiabatic compressibility, free length, free volume, internal pressure, acoustic impedance etc have been evaluated. The different parameters were ploted against the mole fraction of N,N-Dimethylformamide over the whole composition range. The physical parameters were explained on the basis of intermolecular interaction present in the above mixture.

Key words: Ultrasonic velocity, toluene, free volume, acoustic impedance.