Thermodynamics of mixtures containing linear monocarboxylic acids. I. DISQUAC predictions on molar excess Gibbs energies, molar excess enthalpies and solid-liquid equilibria for mixtures of linear monocarboxylic acids with organic solvents

Abstract

Mixtures of linear monocarboxylic acids and n -alkanes, cyclohexane, benzene or tetrachloromethane are studied in the framework of DISQUAC. The model gives a fairly good representation of the molar excess Gibbs energy G E and of solid-liquid equilibria. Larger differences from experimental data are found when predicting the molar excess enthalpy H E ; these are probably due to errors in the measured data. A method to improve DISQUAC results by fitting geometrical parameters of the ethanoic acid is also described briefly.