During the adiabatic expansion of 2 moles of an ideal gas, the increas

1.	During the adiabatic expansion of 2 moles of an ideal gas, the increase in internal energy was found to be equal to (–200 J). The work done by the gas during the process will be equal to (A) 0 (B) 400 J (C) –200 J (D) 200 J
Answer» Correct option (D) 200 J Explanation: According to first law of thermodynamics, ∆Q − ∆W = ∆U For adiabatic process, ∆Q = 0 ∆W = −∆U Therefore, the work done during adiabatic process is negative of the change in internal energy. Thus, the work done by the gas during the process will be equal to 200 J.

During the adiabatic expansion of 2 moles of an ideal gas, the increase in internal energy was found to be equal to (–200 J). The work done by the gas during the process will be equal to (A) 0 (B) 400 J (C) –200 J (D) 200 J

Answer»

Correct option (D) 200 J

Explanation:

According to first law of thermodynamics,

∆Q − ∆W = ∆U

For adiabatic process, ∆Q = 0

∆W = −∆U

Therefore, the work done during adiabatic process is negative of the change in internal energy.

Thus, the work done by the gas during the process will be equal to 200 J.

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During the adiabatic expansion of 2 moles of an ideal gas, the increase in internal energy was found to be equal to (–200 J). The work done by the gas during the process will be equal to (A) 0 (B) 400 J (C) –200 J (D) 200 J

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