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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