Acoustic Properties of Binary Liquid Mixtures of Carbon Tetrachloride With Benzene and Substituted Benzenes

A. K. Gupta¹, Birendra Kumar Karn¹ and Krishna Kumar²

¹University Department of Chemistry, L.N. Mithila University, Darbhanga (India). ²Department of Chemistry, D.N.Y.College, Madhubani, L.N.M.U, Darbhanga (India).

The ultrasonic velocities in binary liquid mixtures of carbon tetrachloride with benzene, toluene, m-xylene, ethyl benzene and chloro benzene have been measured at entire mole fraction range at 303.15K, using ultrasonic interferometer of frequency 2 MHz. Isentropic compressibilities KS, deviations of KS from ideal mole fraction mixture law DKS, available volumes Va, Lennard - Jones potential repulsive term exponents n, molecular interaction terms á etc. have been calculated therefrom. The values of acoustic parameters are explainable by considering the varying extent of molecular interactions and the difference in free volumes between unlike molecules. Observed DKS have been analyzed in the light of Flory’s theory of binary liquid mixtures. Ultrasonic velocities evaluated from Nomoto’s and Ideal mixture relation due to Van Deal et al., have been compared with observed values.

Ultrasonic velocities; Isentropic compressibilities; Nomoto’s relation; Molecular interactions; Flory’s theory