Simultaneous correlation of excess gibbs energy and enthalpy of mixing by the UNIQUAC Equation

Yasar Demirel, Hatice Gecegörmez

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Using data for excess Gibbs energy, gE, and enthalpy of mixing, hE, temperature dependent parameters of the UNIQUAC equation have been estimated for twenty four systems of binary mixtures. Fifteen of them include data for gE and hE at more than one different isotherm. These parameters are later tested in predicting the gE and hE 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.

Original languageEnglish (US)
Pages (from-to)455-461
Number of pages7
JournalThe Canadian Journal of Chemical Engineering
Issue number3
Publication statusPublished - Jun 1989



  • UNIQUAC parameters
  • excess Gibbs energy
  • mixing enthalpy
  • temperature dependent parameters

ASJC Scopus subject areas

  • Chemical Engineering(all)

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