A gas is compressed at a constant pressu...

A gas is compressed at a constant pressure of `50N//m^(2)` from a volume `10m^(3)` to a volume of `4m^(3)`. 100J of heat is added to the gas then its internal energy is

A

increased by 400 J

B

increased by 200 J

C

inceased by100 J

D

decreased by 200 J

Text Solution

Verified by Experts

The correct Answer is:

A

From first law of thermodnamic,
`DeltaQ=DeltaU+DeltaW=DeltaU+pDeltaV`
`rArr" " 100=DeltaU+50xx(4-10)rArrDeltaU=400J`

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