Answer to Question #150498 in Mechanical Engineering for Ferdinand

Question #150498
A system contains 0.25 m3 of air pressure of 4.8 bars and 160⁰ C. It is expanded adiabatically till the pressure falls to 1.5 bar. The air is then heated at a constant pressure till its enthalpy increases by 80 kJ. Sketch the process on a P-V diagram and determine the total work done. Use Cp=1.005 kJ/kg.K and Cv=0.714 kJ/kg.K
1
Expert's answer
2020-12-22T05:04:06-0500

Volume of system contains= 0.25 m3, Air pressure= 4.8 bars and Temperature T1=1600C. P2= 1.5 bar, h=80 kJ,Cp=1.005 kJ/kg.K and Cv=0.714 kJ/kg.K





.1095 m3


Work done in adiabatic process=

Work don in constant pressure = Pdv= h=80 kJ

Total work done= 252.6+80=332.6 kJ


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