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A gas absobs `100J` of heat and is simultaneously compressed by a constant external pressure of `1.50` atmosphere fron a volume of `8L` to `2L` . `DeltaE` will be
A. `-812J`
B. `812`
C. `1011J`
D. `911J`

1 Answer

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Best answer
Correct Answer - B
`DeltaH=100J`
Work done `PDeltaV=1.5(-6)` . Now, this work done is in litre atmosphere. To obtain the same in joules, multiply by `8.314` and divide by `0.0821`
`:. DeltaH=DeltaE+PDeltaV`
or, `100=DeltaE+(1.5(-6))/(0.0821)xx8.314`
or, `DeltaE=1011.4J`

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