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[faxxe]

Hello!
For my studies I have to numerically integrate the Gibbs-Helmholtz equation to get the Gibbs excess free energy of a binary mixture. The specification: the excess enthalpies, dependent on the liquid molar fraction at three different temperatures (263.15 K, 273.15 K and  283.15 K) are given. 
For this task, I decided to use Simpson´s rule for numerical integration.
I derived the Redlich-Kister parameters for each enthalpy data set to get diagrams with constant liquid molar fraction (with 1/T on y-axis and hE on x-axis).
But how is it possible to integrate the Gibbs-Helmholtz equation with the known data? Is this even possible?

Would be thankful for any help!

 

[latexman]

This looks promising:

https://m.youtube.co...h?v=HgLdBZsbDQY