Excess Molar Enthalpies of Benzyl Alcohol + Alkanols (C1−C6) and Their Correlations at 298.15 K and Ambient Pressure

Abstract

Excess molar enthalpies, HmE, for the binary mixtures of benzyl alcohol + methanol, ethanol, propan-1-ol, butan-1-ol, pentan-1-ol, and hexan-1-ol were measured over the entire range of composition at 298.15 K and ambient pressure using a Parr 1455 solution calorimeter. From the experimental results the excess partial molar enthalpies, HiE, and excess partial molar enthalpies at infinite dilution, HiE,∞, were calculated. While the excess molar enthalpies are negative for the methanol mixture, those for ethanol, propan-1-ol, butan-1-ol, pentan-1-ol, and hexan-1-ol mixtures are positive over the entire range of composition of benzyl alcohol. The experimental data were correlated by the Redlich−Kister equation and the two thermodynamics models (Wilson and nonrandom two-liquid, NRTL).