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An ideal gas is expanded from 5 bars to 1 bar through isentropic(reversible and adiabatic) operation...

An ideal gas is expanded from 5 bars to 1 bar through isentropic(reversible and adiabatic) operation of a turbine. For ambient conditions at 25°C and 1 bar, calculate the exergy of the turbine when the gas inlet temperature to the turbine is:

I) above ambient conditions at 250°C (8marks)

ii) below ambient condition at -50°C (8marks)

iii) comment on your answer to I and ii above (4marks)

(Cp=1.0KJ/Kg.K , n=1.4)

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