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A gas absobs 100J of heat and is simulta...

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`

Text Solution

Verified by Experts

The correct Answer is:
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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