podrodow1
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Air contained in an upright piston/cylinder arrangement is compressedfrom an initial pressure of 10 atm. and volume of 0.42m3 to a finalpressure of 25 atm. If the atmospheric pressure is 1.013 bar and thecylinder contains 5kg of air, find the final temperature, the work done andthe heat transfer if the expansion occurs:
Isothermally,
Polytropically with an index of expansion of 1.3,
Isentropically with  = 1.4.

I know and have derived the relevant equations for the work done for each process i.e. for isothermal W=P1V1ln(P2/P1) and W = mRTln(P2/V2)

However using these equations I'm getting the work done to be 3.85KJ....I'm not converting the atm units into pascals and wondering if I should be doing this? Can anyone check if this is correct?
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podrodow1
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don't worry just got it
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