Excess molar enthalpies for 2-propyn-1-ol + 1,2-dichloroethane, + 1,1,1-trichloroethane, + 1,1,2,2-tetrachloroethane, and + trichloroethylene have been measured at 298.15 K with a Parr 1451 solution calorimeter. The excess molar enthalpies are positive over the entire range of composition.