NEET Physics Entropy Assertion Reason Question
Assertion (A): Enthalpy change for vaporization is always positive. | Reason (R): Heat is required to vaporize a liquid at constant temperature and pressure.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context states that standard enthalpy changes like vaporization are always positive because heat is required for the phase change.
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