Excess enthalpy surfaces for alkanol-alkane mixtures by the uniquac model

Y. Demirel, E. Z. Hamad

Research output: Contribution to journalArticlepeer-review


Temperature and composition dependences of excess enthalpy surfaces and composition fluctuations were calculated using the uniquac model and the Kirkwood-Buff theory of statistical mechanics for seven alkanol-alkane mixtures. Surfaces of partial molar excess enthalpies and enthalpy of dilution were also calculated. Temperature-dependent parameters of the uniquac model in the range of 278.15-333.15 K were used in the calculations. The thermodynamic surfaces facilitate better understanding of thermodynamic properties of alkanol-alkane mixtures over the whole mole fraction range in a certain temperature interval. The uniquac model is capable of representing the thermodynamic properties of associating mixtures at low pressures.

Original languageEnglish (US)
Pages (from-to)51-74
Number of pages24
JournalThermochimica Acta
Issue numberC
StatePublished - Aug 15 1995


  • Alkanol-alkane mixtures
  • Composition fluctuations
  • Excess enthalpy
  • Kirkwood-Buff theory
  • Uniquac model

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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