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+// Exa 3.21

+clc;

+clear;

+close;

+// Given data

+Gamma = 1.4;

+P1 = 7;// in bar

+P1= P1*10^5;// in N/m^2

+V1 = 1.6;// in m^3

+V2 = 8;// in m^3

+P2 = (P1 * (V1)^(Gamma))/((V2)^(Gamma));// in bar

+W1 = (P1*V1-P2*V2)/(Gamma-1);//work done by the gas during isentropic expansion in J

+Rho = V2/V1;

+W2 = P1*V1*(log(Rho));//work done by the gas during isothermal expansion in J

+del_W = W2-W1;// in J

+disp(del_W*10^-3,"Difference between the work done during isentropic and isothemal expansion in kJ is");