Air modeled as an ideal gas enters a turbine operating at steady state at 1040 K, 278 kPa and exits at 120 kPa. The mass flow rate is 5.5 kg/s, and the power developed is 1200 kW. Stray heat transfer and kinetic and potential energy effects are negligible. Assuming k = 1.4, determine: (a) the temperature of the air at the turbine exit, in K. (b) the percent isentropic turbine efficiency.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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Air modeled as an ideal gas enters a turbine operating at steady state at 1040 K, 278 kPa and
exits at 120 kPa. The mass flow rate is 5.5 kg/s, and the power developed is 1200 kW. Stray heat
transfer and kinetic and potential energy effects are negligible.
Assuming k = 1.4, determine:
(a) the temperature of the air at the turbine exit, in K.
(b) the percent isentropic turbine efficiency. 

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