Excess volumes and speeds of sound for the binary systems 2-propyn-1-ol + 1,2-dichloroethane, + 1,1,1-trichloroethane, + 1,1,2,2-tetrachloroethane, and + trichloroethylene have been measured at 303.15 K. The data were used to calculate isentropic compressibilities. The excess volumes for all the mixtures were found to be positive. The positive excess volumes and positive deviation in isentropic compressibilities have been attributed to the dissociation of self-associated alcohols with chloroalkanes or chloroalkene.