EXCESS MOLAR ENTHALPIES H-E OF TERNARY MIXTURES OF (METHANOL PLUS ETHANOL PLUS 1-PROPANOL OR 2-PROPANOL) AT 298.15 K

The excess molar enthalpies H-E of the liquid mixtures of (methanol ethanol + I-propanol) and (methanol + ethanol + 2-propanol) have been measured at 298.15 K and atmospheric pressure using a flow microcalori meter. The experimental H-E are used to test the suitability of an ext ended version of the UNIQUAC associated-solution model with binary par ameters alone. The model requires solvation equilibrium constants for alcohols not to be the geometric mean of the self-association constant s to provide better results. (C) 1998 Elsevier Science B.V. All rights reserved.