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Margules functionA Margules function is a function added to the Raoult's law description of a liquid solution to account for deviations from ideality Additional recommended knowledgeThe amended Raoult's law description of the vapor pressure above the solution becomes:
The Margules function has the general form:
The function always contains the opposite mole fraction x2 (= 1-x1 for a binary system). The numbers of Margules parameters α, β, γ, δ, .. varies. The larger the deviations from ideality the more parameters are required. The Gibbs-Duhem relation can be used to fix the Margules function for the second component once the first has been chosen. The case where only one parameter α is needed is know as the regular solution |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Margules_function". A list of authors is available in Wikipedia. |