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