Question: The compressor's efficiency is 8 5 % when it runs with standard atmosphere ( 1 0 0 kPa, 3 0 0 K ) , and

The compressor's efficiency is 85% when it runs with standard atmosphere(100kPa, 300K), and its pressure ratio is 20. How much is the increase of entropy while passing through this compressor? You can ignore the kinetic energy of the entrance, and the exit.

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