Duhem-Margules equation

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The Duhem – Margules equation is a thermodynamic statement about the relationship between two types of particles in a liquid , in which the vapor can be regarded as the ideal gas . It is named after Pierre Duhem and Max Margules .


Here P A and P B are the partial pressures of the steam of the two components and x A and x B are the molar proportions of the liquids.


  • Atkins, Peter and Julio de Paula. 2002. Physical Chemistry , 7th ed. New York: WH Freeman and Co. (English)
  • Carter, Ashley H. 2001. Classical and Statistical Thermodynamics . Upper Saddle River: Prentice Hall. (English)
  • Harris, Joseph : The Duhem-Margules Equation. Algebraic Geometry. Harvard Science Center, Cambridge. 19 Oct. 2009. Lecture. (English)