AIIMS 2019 Chemistry Adiabatic Processes MCQ Question
Assertion : Air that quickly leaks out of a balloon becomes cooler.
Reason : The leaking air undergoes adiabatic expansion.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
In adiabatic expansion, a system does work on its surroundings without exchanging heat (Q = 0), leading to a decrease in internal energy (ΔU < 0). According to the first law of thermodynamics, ΔU = Q - W, this results in a drop in temperature (T) as the system uses its internal energy to perform work. Other options are not applicable in this context, as they do not provide relevant information or correct explanations related to the principles of thermodynamics in adiabatic processes. Understanding this concept is crucial for grasping how energy conservation and temperature changes are interlinked during adiabatic transformations.
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