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Old May 7th 2014, 05:22 AM   #1
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Join Date: Mar 2014
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Margules Equation Parameter

I'm trying to construct a Txy phase diagram for a binary system at a given P=1bar. Given the Antoine Equation Coefficients, I have attempted to create an excel spreadsheet with x_a, x_b, p_a(sat), p_b(sat), P, y_a, y_b and T
Where p_a(sat)=exp(Aa-Ba/(T+Ca))
p_b(sat)=exp(Ab-Bb/(T+Cb))
p_a=x_a*p_a(sat)*gamma_a
p_b=x_b*p_b(sat)*gamma_b
P=p_a+p_b
y_a=x_a*p_a(sat)*gamma_a/P
For T, i used the goal seek function in excel to calculate T to give P=1 bar.
I know from two suffix Margules equation that A=RT ln (gamma)/x_a^2
But i'm not sure how to get the Margules Equation Parameter A.
Can anyone please give me some guide?
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