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+// Display mode
+mode(0);
+// Display warning for floating point exception
+ieee(1);
+clear;
+clc;
+disp("Engineering Thermodynamics by Onkar Singh Chapter 5 Example 3")
+R1=8.314;//gas constant in KJ/kg K
+M=32;//molar mass for O2 
+T1=(27+273);//initial temperature of O2 in K
+p1=125;//initial pressure of O2 in Kpa
+p2=375;//final pressure of O2 in Kpa
+Cp=1.004;//specific heat of air at constant pressure in KJ/kg K
+disp("gas constant for oxygen(R)in KJ/kg K")
+disp("R=R1/M")
+R=R1/M
+disp("for reversible process the change in entropy may be given as")
+disp("deltaS=(Cp*log(T2/T1))-(R*log(p2/p1))in KJ/kg K")
+T2=T1;//isothermal process
+deltaS=(Cp*log(T2/T1))-(R*log(p2/p1))
+disp("so entropy change=deltaS in KJ/kg K")
+deltaS