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+// Exa 3.25

+clc;

+clear;

+close;

+// Given data

+P1 = 14;// in bar

+P3 = 2.222;// in bar

+V3byV1 = P1/P3;

+P2 = 1.05;// in bar

+Gamma = log(P1/P2)/log(V3byV1);

+C_P = 1.005;// in kJ/kg-K

+C_V = C_P/Gamma;// in kJ/kg-K

+T3 = 343;// in degree C

+T3 = T3 + 273;// in K

+T2 = ceil(T3*P2)/P3;// in K

+m = 0.5;// in kg 

+del_U = m*C_V*(T2-T3);// in kJ

+disp(del_U,"Change in internal energy in kJ is");

+disp("i.e. there is a loss of "+string(abs(del_U))+" kJ of internal energy")