Measurements and analysis of excess volumes of some alkan-2-one-1-chloroalkane mixtures using Nitta-Chao and Prigogine-Flory-Patterson models

Excess molar volumes v(E) at 298.15 and 308.15 K and normal atmospheric pressure for the binary mixtures butan-2-one-1-chloroalkane (from 1-chlorobutane to 1-chlorooctane) have been determined from density measurements using a vibrating tube densimeter. The v(E) values for all the mixtures are positive, increase as the 1-chloroalkane length increases, and are slightly dependent on the temperature. Experimental v(E) data are compared with theoretical predictions using the Prigogine-Flory-Patterson model with interaction parameters calculated from excess molar enthalpies measured previously in the same mixtures. These v(E) values, together with literature data on excess molar enthalpies and vapour-liquid equilibria, are then used to determine the interaction energies between chloro and ketone groups on the basis of the Nitta-Chao group-contribution model. These parameters may be used to predict thermodynamical properties of binary or ternary mixtures containing ketones and chloroalkanes.