margules.
A Margules function is a function added to the Raoult's law description of a liquid solution to account for deviations from ideality
The amended Raoult's law description of the vapor pressure above the solution becomes:
P1=P*1x1fM,1
P2=P*2x2fM,2
The Margules function has the general form:
fM,1 = exp(αx22+βx23+γx23+δx24+...)
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 amended Raoult's law description of the vapor pressure above the solution becomes:
P1=P*1x1fM,1
P2=P*2x2fM,2
The Margules function has the general form:
fM,1 = exp(αx22+βx23+γx23+δx24+...)
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.
posted by dark star at 2:03 pm
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