Physical Properties of the Binary Mixtures of Ethanol + Benzene and Ethanol + Pyridine at Five Temperatures under Atmospheric Pressure
Fisnik Aliaj, Altin Gjevori, Naim Syla, Njomza Elezaj, B. Ziberi, Bashkim Dalipi
Abstract
Experimental densities and speeds of sound at temperatures 293.15, 298.15, 303.15, 308.15, and 318.15 K and viscosities at 298.15 K are reported in this paper for the binary liquid mixtures of ethanol + benzene and ethanol + pyridine over the entire composition range and atmospheric pressure. From these experimental data, the excess molar volumes, V E , deviations in viscosity, , and isentropic compressibility s were calculated and fitted by the Redlich-Kister polynomial to determine the adjustable fitting parameters and the standard deviations. The optimal number of adjustable parameters to be included in a Redlich-Kister polynomial for fitting thermodynamic excess and deviation data has been determined through F-test. The variation of excess and deviation functions with composition and temperature has been interpreted in terms of molecular interactions between the components of the mixture and structural effects.