Plateau D is much longer than plateau B for water.
Why is plateau D longer than B?
- Acheck_circle
Vaporization requires more energy than fusion (greater enthalpy change)
- B
Liquid water has a smaller heat capacity
- C
Steam absorbs less heat than ice
- D
Boiling occurs at a lower temperature
Explanation
The enthalpy of vaporization (<del>40.7 kJ/mol for water) is much larger than the enthalpy of fusion (</del>6.0 kJ/mol), so a longer plateau is required at the same heating rate.