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+//Example 7.8
+clear;
+clc;
+
+//Given
+R=8.314;//gas constant in J K^-1 mol^-1
+T=298;//temperature in K
+n1=1;//moles of toluene
+n2=2;//moles of benzene
+
+//to determine the free energy of mixing
+x1=n1/(n1+n2);//mole fraction of toluene
+x2=n2/(n1+n2);//mole fraction of benzene
+delGmix=R*T*((n1*log(x1))+(n2*log(x2)));//free energy of mixing in J
+delSmix=-delGmix/T;//entropy change in J K^-1
+mprintf('The free energy of mixing = %f J',delGmix);
+mprintf('\n The entropy of mixing = %f J K^-1',delSmix);
+//end
+\ No newline at end of file