Excess molar enthalpies for binary mixtures with trichloroethylene + alkan-1-ols (C3-C8) at 298.15 K

Excess molar enthalpies H m E for trichloroethylene + propan-1-ol, + butan-1-ol, + pentan-1-ol, + hexan-1-ol, + heptan-1-ol, and + octan-1-ol have been measured at 298.15 K with a Parr 1451 solution calorimeter. The H m E values are found to be endothermic for all the mixtures rich in alkan-1-ols and become exothermic around 0.15 mole fraction of trichloroethylene. For all the systems, the value of - H m E at the minimum increases from propan-1-ol to octan-1-ol. The results are explained in terms of dissociation of the self-associated alkan-1-ol molecules and the formation of aggregates between unlike molecules through Cl...H...O bonding.