heat of solution vs heat energy

heat of solution and heat energy both are nouns.

Word	Noun	Adjective	Verb	Adverb
heat of solution	Yes	No	No	No
heat energy	Yes	No	No	No

As nouns, heat energy is a hypernym of heat of solution; that is, heat energy is a word with a broader meaning than heat of solution:

heat of solution: the heat evolved or absorbed when one mole of a substance is dissolved in a large volume of a solvent
heat energy: a form of energy that is transferred by a difference in temperature

Other hypernyms of heat of solution include heat.

heat of solution (noun)	heat energy (noun)
the heat evolved or absorbed when one mole of a substance is dissolved in a large volume of a solvent	a form of energy that is transferred by a difference in temperature