Calorimetric study of deuterium isotope effects in water-acetic acid systems

Abstract

The molar excess enthalpies of water+acetic acid systems are analysed to give the enthalpy of the reaction

              2HA(1)+D₂O(1) → 2DA(1)+H₂O(1) (A=CH₃COO or CD₃COO)

the value obtained at 298 K is -0.15±0.04 kJ mol^-1. Molar excess enthalpies at 298.15 K are reported for the systems H₂O+CH₃COOH, H₂O+CD₃COOD, D₂O+CH₃COOH and D₂O+CD₃COOD.