Surface tension and ultrasonic velocity of binary liquid mixtures at 298.15 K

Using the Brock and Bird relation and the Flory statistical theory, the sur face tension of five binary mixtures of 1,1,2,2-tetrachloroethane with benz ene, toluene, p-xylene, acetone and cyclohexane have been evaluated at 298. 15 K. The values of surface tension thus obtained have been utilized to com pute ultrasonic velocity via the Auerbach relation. Theoretical values have been compared with experimental data and deviations in the ultrasonic velo city have been interpreted in terms of intermolecular interactions.