Enthalpies of Mixing for the Binary Mixtures of Tetrachloroethylene with Some Alkan-1-OLS (C₃-C₈) at 298.15 K

Abstract

Enthalpies of mixing H_M ^m have measured for binary mixtures of tetrachloroethylene with six alkan–1–ols (propan–1–ol, butan-1–ol, pentan–1–ol, hexan–1–ol, heptan–l–ol and octan–l–ol) at 298.15 K using a Parr 1451 solution calorimeter. All the studied mixtures present exothermic event and showed minimum negative H_M ^m values in mixtures from propan–1–ol to octan–1–ol in mixtures rich in tetrachloroethylene region around 0.65–0.70 mole fraction. The mixing H_M ^m values increases with the chain length of alkan–1–ols. The experimental data explained in term of dissociation of self–associated alkan–1–mols and tetrachloroethylene.

Key Words:

• Enthalpies of mixing
• tetrachloroethylene
• alkan–1–ol
• dissociation