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+//Calculate the Change in Gibbs Energy 
+
+//Example 6.4
+
+clc;
+
+clear;
+
+P1=1.50;  //Initial pressure in bar
+
+P2=6.90;  //Final pressure in bar
+
+n=0.590;  //Number of mole of sample in mol
+
+T=300;  //Temperature of the gas in K
+
+R=8.314;  //Gas constant in J K^-1 mol^-1
+
+delG=(n*R*T)*log(P2/P1);  //Gibbs energy in J
+
+printf("Change in Gibbs Energy = %.2f *10^3 J",delG*10^-3);