Air is expanded in an internally reversible process from p1=10.29 bar and T1=1200K to a final pressure of p2= 1.00 bar. Determine all properties of the initial and final states (T,p,v,h and u), calculate the work of the process per unit mass, and sketch the process in the T-s and p-v diagrams assuming ideal gas behavior in the 4 following cases. Adiabatic reversible expansion in an ideal turbine (1 inlet and 1 outlet); Adiabatic reversible expansion in a (closed) frictionless piston–cylinder device; Isothermal reversible expansion in an ideal turbine (1 inlet and 1 outlet); Isothermal expansion in a (closed) frictionless piston–cylinder device.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Air is expanded in an internally reversible process from p1=10.29 bar and T1=1200K to a final pressure of p2= 1.00 bar.

Determine all properties of the initial and final states (T,p,v,h and u), calculate the work of the process per unit mass, and sketch the process in the T-s and p-v diagrams assuming ideal gas behavior in the 4 following cases.

  1. Adiabatic reversible expansion in an ideal turbine (1 inlet and 1 outlet);
  2. Adiabatic reversible expansion in a (closed) frictionless piston–cylinder device;
  3. Isothermal reversible expansion in an ideal turbine (1 inlet and 1 outlet);
  4. Isothermal expansion in a (closed) frictionless piston–cylinder device.

Kinetic and potential energy terms are negligible in all processes 

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