Answer:
Step-by-step explanation:
There are two options for this answer: heat of fusion or heat of vaporization.
Let's define both of the terms.
Heat of fusion:
- The amount of heat needed to change a substance from a solid to a liquid.
Heat of vaporization:
- The amount of heat required to change a substance from a liquid to a gas.
The question asks us which type of heat provides the energy for the phase change of a liquid to a gas. Therefore, the correct answer is heat of vaporization.