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If a gas absorbs 200J of heat and expand...

If a gas absorbs 200J of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) Nm^(-2)` then change in internal energy is

A

23.92Cal

B

`-100J`

C

`+100J`

D

`+300J`

Text Solution

Verified by Experts

The correct Answer is:
A, C
`Delta U =q + W_("on") = q - P_("ext") Delta V`
`= +200 - 2 xx 10^(5) xx (+500) xx 10^(-6)`
`= 100J = 23.9` cal
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