Consider the compression of air from 10³ Pa at 27°C to 3x 10° Pa in an ideal two stage compressor with intercooling. Assume that the temperature of the air leaving the Intercooler is also 27°C, and that the optimum interstage pressure is used. The compressor is water- jacketed and the polytropic exponent n is 1.30 for both stages. Determine the work of compression per kg of air.

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