Excess Molar Enthalpies for Binary Mixtures of Benzyl Alcohol and Heptanone Isomers at Different Temperatures

Abstract

Excess molar enthalpies for the binary mixtures of benzyl alcohol + 2-heptanone, + 3-heptanone, + 5-methyl-2-hexanone, and + 2,4-dimethyl-3-pentanone were measured over the entire composition range at (298.65, 303.55, and 308.50) K using a Calvet-type microcalorimeter. The excess molar enthalpies are positive for all the mixtures with their maximums between (300 and 500) J·mol-1. The Redlich−Kister polynomial was used to correlate the experimental results. The experimental results are discussed in terms of intermolecular interactions, particularly hydrogen-bonding interactions between like and unlike molecules.