Thermochimica Acta, Vol.237, No.2, 261-275, 1994
Application of DISQUAC to Binary-Liquid Organic Mixtures Containing 1-Alkanols and CCl4
The data available in the literature on vapour-liquid equilibria (VLE), molar excess Gibbs energies G(E), molar excess enthalpies H(E), activity coefficients gamma(i)infinity, and partial molar excess enthalpies H(i)E,infinity at infinite dilution of 1-alkanol(1) + tetrachloromethane(2) mixtures are examined on the basis of the DISQUAC group contribution model. The components of the mixtures are characterized by three types of surface groups : hydroxyl (OH group), alkane (CH3 or CH2 groups), and tetrachloromethane (CCl4 group). The alkane/CCl4 and alkane/hydroxyl interaction parameters are available in the literature. The parameters for the hydroxyl/CCl4 interactions are reported in this work. The model provides a good description of the VLE and of the related G(E) data. For the H(E) data, surprising larger discrepancies are encountered for systems containing 1-propanol or 1-butanol. The temperature dependence of the H(E) values is fairly well represented. Predictions for the natural logarithms of the activity coefficients at infinite dilution and on H(i)E,infinity are similar to those for other 1-alkanol(1) + organic solvent(2) mixtures.
Keywords:GROUP CONTRIBUTION MODEL;TETRACHLORIDE METHANOL CHLOROFORM;LIMITING ACTIVITY-COEFFICIENTS;EXCESS MOLAR ENTHALPIES;CARBON-TETRACHLORIDE;VAPOR-LIQUID;MOLECULAR-INTERACTIONS;TETRACHLOROMETHANE +;LINEAR CARBONATES;INFINITE DILUTION