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A gas absorbs 400J of heat and expands b...

A gas absorbs 400J of heat and expands by `2 xx 10^(-3) m^(3)` against a constant pressure of `10^(5)Nm^(-2)`. The cahnge in internal energy of gas is

A

Zero

B

`200 J`

C

`-600 J`

D

`-200 J`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaE=q+W`, `q=+400 J`,
`W=-PDeltaV=-1xx2xx100`
`DeltaE=400-200=+200 J`
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