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+// Y.V.C.Rao ,1997.Chemical Engineering Thermodynamics.Universities Press,Hyderabad,India.

+

+//Chapter-4,Example 1,Page 94

+//Title:Net work done by the system

+//================================================================================================================

+clear 

+clc

+

+//INPUT

+Q1=50;//Energy added as heat in kJ when the system undergoes a process 1-2

+W1=30;//Work done by the system in kJ during the process 1-2

+Q2=-40;//Energy rejected as heat in kJ during the process 2-3

+W2=-50;//Work done on the system in kJ during the process 2-3

+Q3=0;//System undergoes an adiabatic process to return to initial state

+

+//CALCULATION

+U2_1=Q1-W1;//calculation of net change in energy in kJ during process 1-2 using Eq.(4.5)

+U3_2=Q2-W2;//calculation of net change in energy in kJ during process 2-3 using Eq.(4.5)

+U1_3=(-U2_1)-(U3_2);//calculation of net change in energy in kJ during process 3-1 using Eq.(4.5)

+W3=Q3-U1_3;//calculation of work by the system in kJ using Eq.(4.5)

+net_work=W1+W2+W3;//calculation of net work done in kJ

+

+//OUTPUT

+mprintf('\n The net work done by the system= %d kJ\n',net_work);

+

+//===============================================END OF PROGRAM===================================================