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We have air in the piston that is undergoes 2 process in series. in the first...

We have air in the piston that is undergoes 2 process in series.

in the first step. the air is compressed such a way that the process is described a polytropic where PVn = constant . The initial state of air is 100Kpa. 0.04m3/kg. the final specific volume at the end of first process is 0.02m3/kg. n= 1.3

in the second step. the air is subject to constant pressure process where the final specific volume is equal to the initial state  

a) sketch the process on a P-v diagram and label the state 1,2,3 ?

b) determine the specific work (work per unit mass of air ) for each step and overall process ?

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