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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 7 Example 23")
+m=75;//mass of hot water in kg
+T1=(400+273);//temperature of hot water in K
+T2=(27+273);//temperature of environment in K
+Cp=4.18;//specific heat of water in KJ/kg K
+disp("here the combined closed system consists of hot water and heat engine.here there is no thermal reservoir in the system under consideration.for the maximum work output,irreversibility=0")
+disp("therefore,d(E-To-S)/dt=W_max")
+disp("or W_max=(E-To-S)1-(E-To-S)2")
+disp("here E1=U1=m*Cp*T1,E2=U2=m*Cp*T2")
+disp("therefore,W_max=m*Cp*(T1-T2)-To*m*Cp*log(T1/T2)in KJ")
+To=T2;
+W_max=m*Cp*(T1-T2)-To*m*Cp*log(T1/T2)
+disp("so maximum work in KJ=")
+W_max