Answer: Option (C) is the correct answer.
Explanation:
When one mole of a substance is heated to change its phase from solid to liquid then the heat required to bring this change is known as heat of fusion.
Whereas a point where vapor pressure of liquid equals the atmospheric pressure of the surrounding liquid then it is known as boiling point.
A temperature where a substance starts to melt is known as melting point.
Heat of vaporization is defined as the amount of heat required to change one mole of a liquid into vapor state.
Whereas a point of temperature where liquid turns into solid is known as freezing point.
Thus, we can conclude that the correct term used to describe the amount of heat required to prompt a phase change in the given situation is heat of fusion.
