Thermodynamics Research Center / ThermoML | Thermochimica Acta

ABSTRACT

The densities yenn, and viscosities yenc, of pure toluene, cyclohexane, and n-hexane and those of their binary and ternary mixtures have been measured at 298.15K and atmospheric pressure over the entire range of compositions. Excess molar volumes VE 123, viscosity deviations , and excess Gibbs energy of activation G.E 123, were obtained from the experimental results and those values for the binary and ternary systems were fitted to Redlich.Kister!-s and Cibulka!-s type function in terms of mole fractions. The VE 123 data were positive and v.E. and G.E 123, values were negative. Several semi-empirical relations are used to predict the ternary excess molar volumes and viscosity deviations from experimental results on the constituted ternary and analyzed to discuss the nature and strength of intermolecular interactions in these mixtures.