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

+

+//Chapter-6,Example 6,Page 218

+//Title: Work done by steam

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

+clear 

+clc

+

+//INPUT

+m=0.1;//mass of superheated steam in the piston cylinder assembly in kg

+P1=1;//initial pressure of superheated steam in MPa

+T1=300;//initial temperature of superheated steam in degree celsius

+P2=0.1;//pressure of steam after expansion in MPa

+T2=200;//temperature of steam after expansion in degree celsius

+

+//CALCULATION

+//For steam at P1 and T1:

+h1=3052.1;//specific enthalpy of steam in kJ/kg

+v1=0.2580;//specific volume of steam in m^3/kg

+

+//For steam at P2 and T2:

+h2=2875.4;//specific enthalpy of steam in kJ/kg

+v2=2.1720;//specific volume of steam in m^3/kg

+

+del_u=(((h1*10^3)-(P1*10^6*v1))-((h2*10^3)-(P2*10^6*v2)))*10^-3;//calculation of the change in internal energy of the steam in kJ/kg

+W=m*(del_u);//calculation of the work done by  using Eq.(6.77)steam in kJ

+

+//OUTPUT

+mprintf("\n The work done by steam=%0.2f kJ\n",W);

+

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