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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

`197.4 J`

C

`-600 J`

D

`+200J`

Text Solution

Verified by Experts

The correct Answer is:
D
`Delta E=q+W,q=+400J`
`W=-PDeltaV=10^(5)Nm^(-2)xx10^(-3)m^(3)`
`=200Nm`
as `1J=Nm:. Delta E =+400-200=200`J
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