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One mole of a gas occupying 3 dm^3 expan...

One mole of a gas occupying 3 dm^3 expands against constant external pressure of 1 atm to a volume of 13 dm^3. The work done is:

A

`-10 atm dm^3`

B

`-20 atm dm^3`

C

`-39 atm dm^3`

D

`-48 atm dm^3`

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The correct Answer is:
A
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