Physico-chemical Laboratories, College of Engineering Sri Venkateswara University, Tirupati- 517 502, India  

Sound velocities for binary mixtures of 1,2-dichloroethane with isopropanol, isobutanol, sec-butanol, tert-butanol, isopentanol, isohexanol and cyclohexanol were determined at 303.15 K. Isentropic compressibilities were computed from sound velocity and density data derived from excess volume. The deviation in isentropic compressibility exhibits negative values of dichloroethane with isopropanol and tert-butanol, but are positive in the mixtures of dichloroethane with isobutanol, isopentanol, isohexanol, sec-butanol and cyclohexanol. The results are explained in terms of interactions between unlike molecules.