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5 mole of an ideal gas of volume is expa...

5 mole of an ideal gas of volume is expanded against vaccum to make its volume 2 times, then work done by the gas is:

A

`-RT(V_(2)-V_(1))`

B

zero

C

`C_(V)(T_(2)-T_(1))`

D

`-RTlnV_(2)//V_(1)`

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