Temperature-induced variations in the thermophysical properties of the binary mixtures of heptan-1-ol with cumene, or mesitylene: An experimental and theoretical approach

Densities and speeds of sound were determined for the binary mixtures of heptan-1-ol with cumene, or mesitylene at atmospheric pressure and varying temperatures in the range of 298.15-323.15 K. The experimental data were used to calculate excess molar volumes, deviations in speeds of sound, isentropic compressibilities, and excess isentropic compressibility for the binary systems, and correlated using a Redlich-Kister type equation. The temperature-induced variations in volumetric or acoustic behavior with the change in binary composition were analyzed to investigate the molecular interactions among the components in the binary mixture. The modified Rackett equation was used to predict the molar volume, while free length theory and collision factor theory were used to compute the speeds of sound of the component liquids and the binary mixtures. The corresponding experimental and theoretical data were compared to evaluate the validity of the predictive and correlative approaches. (C) 2019 Elsevier B.V. All rights reserved.