Collect. Czech. Chem. Commun. 2000, 65, 1497-1505

Evaluation of Heterodimerization Constant from Solid-Liquid and Vapor-Liquid Equilibrium Data

Ivona Malijevská

Department of Physical Chemistry, Prague Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic


Activity coefficients obtained from the solid-liquid equilibrium data were used to fit the isobaric vapor-liquid equilibrium data to evaluate the vapor-phase equilibrium constant of heterodimerization of the system propanoic acid-trifluoroethanoic acid. The found hetero-dimerization constant is several times higher than that estimated on the basis of the "double-geometric-mean" rule and its temperature dependence has the form ln KAB = 7 196.7/T - 26.80.

Keywords: Vapor-liquid equilibrium; Solid-liquid equilibrium; Equilibrium constants; Dimerization; Carboxylic acids; Activity coefficients; Thermodynamics.

References: 12 live references.