Thermo-Acoustical Molecular Interaction Studies in Ternary Liquid Mixtures by Ultrasonic Velocity Measurements at 303K Rohini V*, Dr. Kesavasamy R**, Chithradevi R*** *Assistant Professor, Anna University, India **Associate Professor, Anna University, India ***Assistant Professor, Periyar University, India Online published on 14 October, 2016. Abstract The thermo-acoustical parameters for ternary liquid mixtures namely Acetonitrile + Nitrobenzene in a non polar solvent have been estimated, from the measured values of ultrasonic velocity (U), density (ρ) and viscosity (η). Using the measured data, some of the acoustical parameters such as adiabatic compressibility(β), free length (Lf), free volume (Vf), internal pressure (πi), acoustic impedance (Z), relaxation time (τ), Gibb's free energy (ΔG), classical absorption coefficient (α/f2), cohesive energy (H) are evaluated at the temperature 303K. The behavior of these parameters with composition of the mixture has been discussed in terms of molecular interaction between the components of the liquids. Top Keywords Ultrasonic velocity, adiabatic compressibility, Gibb's free energy, internal pressure, relaxation ti. Top |