Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Densities, n, and molar excess volumes, VE, for binary and ternary systems of (1,4-dioxane, 1-propanol or 2-propanol and 1,2-dichoroethane), were measured over the whole composition range, at T = [288.15, 298.15, 308.15 and 318.15] K and atmospheric pressure. The density measurements were performed using an Anton Paar vibrating U-tube densimeter. The binary mixtures of 1-propanol or 2-propanol with 1,4-dioxane present positive VE values over the whole composition and working temperature ranges, whereas with 1,2-dichloroethane even negative VE values are observed at higher alcohol mole fraction and at lower temperature. The VE magnitude, for the alkanol containing binary mixtures, increases as the temperature increases and, decreases for 1,4-dioxane + 1,2-dichloroethane. The experimental VE data, for all the binary mixtures, were fitted to the Redlich-Kister equation. For all the ternary mixtures, the excess molar volumes are found to be positives and increase with the temperature increase. The experimental ternary VE values were fitted to Cibulka equation. The capability of the Prigogine-Flory-Patterson theory (PFP model) in predicting excess volume, for binary mixtures, was tested. Comparison of the experimental VE values with the PFP calculations, for all the binary mixtures, at 298.15 K, was graphically presented.