Mechanical Principles, Compressor Air Storage Question, need some help1?

Posted on 2016-05-16 18:45:00 in Engineering by HAYLEY

A compressor air storage cylinder has a volume of 0.5mcubed and contains air at an absolute pressure of 1.3MPa and temperature 20degreesC. A quantity of air is released during which temperature of the remaining air falls to 15degreeC and the pressure to 1.2MPa 

b) Calculate the mass of the air released. The characteristic gas constant for air is 287 Jkg^-1K^-1

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