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+//Chapter 3: Thermodynamic and Chemical Equilibrium
+//Problem: 10
+clc;
+
+//Declaration of Constant
+R = 8.314                   //in J / K
+
+//Declaration of Variables
+V_O2 = 2.8                  //in litres
+V_H2 = 19.6                 //in litres
+
+// Solution
+na = V_O2 / 22.4            //in mol
+nb = V_H2 / 22.4            //in mol
+Xa = na / (na + nb)
+Xb = nb / (na + nb)
+d_s = (- R) * (na * log(Xa) + nb * log(Xb))
+
+mprintf("The increase in entropy on mixing is : %.3f J /K",d_s)