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Question: During the adiabatic expansion of 2 moles of a gas, the internal energy of the gas is found to decre...

During the adiabatic expansion of 2 moles of a gas, the internal energy of the gas is found to decrease by 2 joules, the work done during the process on the gas will be equal to

A

1 J

B

−1 6muJ- 1\mspace{6mu} J

C

2 J

D

– 2 J

Answer

– 2 J

Explanation

Solution

dQ=0=−2+dW⇒dW=2 6muJdQ = 0 = - 2 + dW \Rightarrow dW = 2\mspace{6mu} J

⇒\RightarrowWork done by the gas =2 6muJ= 2\mspace{6mu} J

⇒\Rightarrow Work done on the gas =−2 6muJ= - 2\mspace{6mu} J