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Question

Which of the following options are correct regarding the molar heat capacity (C) for the gas whose PV graph is shown below.

A
C=
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B
C=0
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C
C=R
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D
C=2R
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Solution

The correct option is B C=0
We know, internal energy (U)
U=nfRT2=PVf2 ....(1) [PV=nRT]
Also, molar heat capacity (C)
C=UT=T(PVf2) ...(2) (from (1))
As, PV= constant [given]
PVf2= constant.....(3)
[Degree of freedom (f) of a gas is constant]
From (2) and (3),
C=0

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