Question

Molar entropy of vaporization at normal boiling point in J/K·mole is:

• A. 80
• B. 90
• C. 200
• D. 92

Hint:

Relate entropy of vaporization to temperature and enthalpy for phase transitions.

Answer 1

The Correct Option is D

The molar entropy of vaporization is given by \( \Delta S = \frac{\Delta H}{T} \). For most liquids at their boiling point, the entropy of vaporization is approximately \( 92 \, \text{J/K·mole} \).