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Question

The heat transferred in the process.

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Solution

Given:-
P=aV(1) a : constant
Vi=Vo and Vf=3Vo
Heat transfer (Q):
dQ=dU+PdV(2)
dU=CVdT
=32RdT(3)[CV=32RforMonoatomic]
Now Ideal gas equation,
PV=RT
aV2=RT [using (1)]
2aV=RdTdV
RdT=2aVdV
Put in (3)
dU=32(2aVdV)=3aVdV
dQ=dU+PdV
=3aVdV+aVdV [using (1) &(2)]
dQ=4aVdV
Q=4aV223VoVo=2a[(3Vo)2Vo2]
Heat transfer; Q=16aVo2
Hence, the answer is Q=16aVo2.

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