STANDARD Physics Adiabatic Processes MCQ Question
In an adiabatic process, no transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following.
q = 0, ΔT ≠ 0, W = 0
q ≠ 0, ΔT = 0, W = 0
q = 0, ΔT = 0, W = 0
q = 0, ΔT < 0, W ≠ 0
Correct Answer
Detailed Explanation
For free expansion (i.e. in vacuum), P_ext = 0. Thus, W = -P_ext ΔV = 0. For adiabatic change, q = 0. U = q + W = 0 which is true for isothermal process where T is constant i.e., ΔT = 0.
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