Study of intermolecular interaction in dimethylsulphoxide+1-alkanols (1-butanol, 1-hexanol, 1-octanol) at 303.15k

The ultrasonic velocity, u, viscosity, eta, and density, rho of dimethylsul phoxide (DMSO), 1-butanol, 1-hexanol, 1-octanol, and of their binary mixtur es, where DMSO is common component, have been measured at 303.15K. From the experimental data, excess isentropic compressibility, K-s(E) excess interm olecular. free length, L-f(E), excess velocity, u(E), excess acoustic imped ance, Z(E), excess viscosity, eta(E), excess free energy of activatobn of v iscous flow, G*(E). and excess rheochore, [R-E] have been calculated. The b ehaviours of excess functions with composition of the mixtures suggest that the structure-breaking effect dominates over the interaction effect betwee n the component molecules. Furthermore, the experimental values of u and et a were fitted by empirical equations stating their dependence on compositio n of the mixtures. The experimental values of u have been compared with tho se calculated by using Nomoto and Van Dael relations.