Dear Student,
As you might be knowing, for adiabatic process,
P1*V1^(gamma) = P2*V2^(gamma)
And P1 = 150kPa & V1 = 1600cc & V2 = 400cc,
Putting the formula, you will get the P2 as 1200kPa.
Similarly you can find the work done on the gas in the process.
Hope this helps. Thanks.
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