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
-2 J
dQ=0=−2+dW⇒dW=2J
⇒ Work done by the gas = 2J
⇒ Work done on the gas = -2J