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Simultaneous correlation of excess gibbs energy and enthalpy of mixing by the UNIQUAC Equation
Author(s) -
Demirel Yasar,
Gecegörmez Hatice
Publication year - 1989
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450670316
Subject(s) - uniquac , enthalpy , thermodynamics , gibbs free energy , mixing (physics) , entropy of mixing , enthalpy of mixing , chemistry , physics , activity coefficient , non random two liquid model , quantum mechanics , aqueous solution
Using data for excess Gibbs energy, g E , and enthalpy of mixing, h E , temperature dependent parameters of the UNIQUAC equation have been estimated for twenty four systems of binary mixtures. Fifteen of them include data for g E and h E at more than one different isotherm. These parameters are later tested in predicting the g E and h E data simultaneously and representing the effect of temperature on such data. The UNIQUAC equation with temperature dependent parameters represents larger values of maximum heat of mixing than does the UNIQUAC equation with the parameters independent of temperature.