Applications of the Gibbs-Duhem Equation

• P. Nikitas ^[1]
  1. [1] Aristotle University of Thessaloniki

     Aristotle University of Thessaloniki

     Dimos Thessaloniki, Grecia

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 78, Nº 8, 2001, pág. 1070
• Idioma: inglés
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• Resumen

  • It is shown that the Gibbs-Duhem equation can be used for the calculation of (i) a partial molar quantity of a binary mixture from measurements of the composition dependence of the corresponding total molar quantity, (ii) the partial molar quantity of a component, say 1, of a binary mixture from measurements of the composition dependence of the corresponding partial molar quantity of component 2, and (iii) the partial vapor pressures from measurements of the liquid-phase composition dependence of the total vapor pressure. All these calculations require a curve-fitting procedure. Using tabulated experimental data the accuracy of the calculated quantities was found to be comparable to the accuracy of the original experimental data.