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//Calculate the Gibbs Energy and Entropy of mixing of Argon and Nitrogen
//Example 7.1
clc;
clear;
n1=1.6; //Number of moles of Argon at 1 atm
n2=2.6; //Number of moles of Nitrogen at 1 atm
XAr=n1/(n1+n2); //The mole fraction of Argon and Nitrogen
XN2=n2/(n1+n2); // The mole fraction of Nitrogen and Argon
n=n1+n2; //Total moles of gas in mol
R=8.314; //Gas constant in J K^-1 mol^-1
T=298; //Temperature of the gas
delmixG=n*R*T*(XAr*log(XAr)+XN2*log(XN2))/1000; //The Gibbs Energy of mixing in kJ
printf("Gibbs Energy of mixing = %.1f kJ",delmixG);
delmixS=-(delmixG*1000)/T; //Entropy of mixing in J K^-1
printf("\nEntropy of mixing = %.0f J K^-1",delmixS);
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