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Question:

N mole of an ideal gas with constant volume heat capacity C_V undergo an isobaric expansion by a certain volume. The ratio of the work done in the process to the heat supplied is:

4nRCV−nR

nRCV−nR

4nRCV+nR

nRCV+nR

Solution:

Correct option is C.
nRCV+nR
w=nRΔT
ΔH=(Cv+nR)ΔT
w/ΔH=nR/(Cv+nR)