Optical and viscometric properties for 1-chlorohexane + toluene/tetradecane binary mixtures at temperatures from 298.15 K to 318.15 K and atmospheric pressure

Abstract

The optical and viscometric properties for two binary mixtures of 1-chorohexane with toluene and tetradecane, were measured at several temperatures in the range of (298.15–318.15) K and atmospheric pressure.The experimental values for refractive indices and viscosities, for both systems were correlated by the Jouyban-Acree model with good accuracy.By using the obtained experimental results, the related excess and deviation quantities, as the deviation in refractive indices, the molar refractions, the deviation in molar refraction and the deviation in viscosities, were calculated and reported in this work. All these excess properties were correlated with the Redlich-Kister polynomial equation.The Lorentz–Lorenz, Gladstone–Dale, Arago–Biot, Edwards, and Eykman predictive equations have been used to calculate the refractive index on basis of measured density, and their accuracy was analyzed.Some different equations: Grunberg–Nissan, Katti Chaudry, Hind, Dolezalek, and three-body McAllister interaction model, were used to calculate the viscosities values and a comparison with those values with the experimental data was made. From the viscosity experimental data, the molar enthalpy of activation and the molar entropy of activation for viscous flow, as well as the excess Gibbs energy of activation for viscous flow, were calculated for both studied binary mixtures.Discussions concerning the experimental and calculated results in relation to the molecular interactions and structural effects between components of mixtures are presented.