Physics-Entropy
NEET Physics Entropy Assertion Reason Question
Type: Assertion Reason-assertion-Easy-Class 11
Assertion (A): Enthalpy change for vaporization is always positive. | Reason (R): Heat is required to vaporize a liquid at constant temperature and pressure.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true, but R is false.
D
A is false.
Correct Answer
Option A
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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