Nitrogen gas enters a turbine at 7 MPa, 500 K, 100 m/s and leaves at 1 MPa,

Question:

Nitrogen gas enters a turbine at 7 MPa, 500 K, 100 m/s and leaves at 1 MPa, 300 K, 150 m/s at a flow rate (m) of 2 kg/s. Heat is being lost to the surroundings at 25oC at a rate of 100 kW. Determine (a) the power output (Wext) and (b) irreversibility. Use the real gas model. (c) What-if Scenario: What would the power output be if the mass flow rate were 1 kg/s?