A steam turbine generates power by expanding steam from 30 bar, 450 C to 8 bar. a)

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A steam turbine generates power by expanding steam from 30 bar, 450 °C to 8 bar.

a) Determine the amount of work and the exit temperature if operation is reversible. 

b) Repeat the calculation assuming an efficiency of 80%. How much is the lost work due to the reduced efficiency?  

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