1. The problem statement, all variables and given/known data Air is to be compressed from a pressure of 1 bar and a temperature of 20°C to a pressure of 15 bar in a two stage compressor with intercooling. After intercooling the air temperature returns to 20°C and the polytropic index of compression is 1.28. If the input power per stage of compression is 2 kW, calculate: The volumetric flow rate of free air (at 1 bar and 20°C) in m3 s–1. 2. Relevant equations PV = mRspecificT V = (mRspecificT)/P 3. The attempt at a solution V = (1 x 287 x (20+273))/1x105 V = 84091/1*105 V = 0.841 This attempt is using all the information I have. But I don't think this is the correct solution as the units don't balance to leave m3 s-1 (I think). Any direction?