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One mole of an ideal gas at temperature ...

One mole of an ideal gas at temperature T was cooled isochorically till the gas pressure fell from P to `(P)/(n)`. Then, by an isobaric process, the gas was restored to the initial temperature. The net amount of heat absorbed by the gas in the process is

A

nRT

B

`(RT)/n`

C

`RT(1-n^(-1))`

D

`RT(n-1)`

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