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Calculate the work done when one mole of a perfect gas is compressed adiabatically. The initial pressure and volume of the gas are `105 N//m^2` and 6 litres respectively. The final volume of the gas are 2 litre. Molar specific heat of the gas at constant volume is `3R//2`.

A

`-957J`

B

`+957 J`

C

`-805 J`

D

`+805 J`

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