AIIMS 2018 Chemistry First Law of Thermodynamics Assertion Reason Question
Assertion: Addition of Q and w give ΔU Reason: Addition of two path function can not give state function.
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
The assertion is true because the addition of heat (Q) and work (w) does indeed result in a change in internal energy (ΔU) according to the first law of thermodynamics: ΔU = Q + w. However, the reason is false; while it is true that path functions (like Q and w) cannot be directly added to yield a state function (like ΔU), the assertion itself is not dependent on this reasoning. Options A and B are incorrect because they imply that the reason correctly explains the assertion, which it does not, and option D is incorrect since the assertion is valid.
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