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A gas absorbs `250 J` of heat and expands from `1` litre to `10` litres against the pressure `0.5` atmosphere at constant temperature. The values of `q`, `w` and `DeltaE` are respectively
A. `+250`, `-455 J`, `-205 J`
B. `250J`, `455 J`, `205 J`
C. `-250J`, `205 J`, `455 J`
D. `-205J`, `-250 J`, `-455 J`

1 Answer

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Best answer
Correct Answer - A
`q=250 J`, `W=-P(V_(2)-V_(1))`
`=-0.5(10-1)=4.5 L-"atm"`
`=-4.5xx101J=-455J`
`DeltaE=q+w=250+(-455)`
`=-205 J`

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