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An air compressor, operated at steady state, compresses air from 1 bar 25oC to 10 bar....

An air compressor, operated at steady state, compresses air from 1 bar 25oC to 10 bar. At the outlet of the compressor, the air temperature is 80oC. The compressor transfers heat to the surroundings at 300kJ for each kg of air passing through the compressor. The average temperature at which the heat is transferred is 50oC. Which of the following values is closest to the specific entropy production of the compressor process? For air, Cp=1.01 kJ/kgK and R=0.286kJ/kgK. Hints: Air can be treated as ideal gas.

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