Explain how heat as a reactant or product in a chemical reaction makes the change endothermic or exothermic?

✅Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.

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Heat as a reactant makes the change endothermic, while heat as a product makes the change exothermic.

Explanation:

In an endothermic reaction, heat is a reactant, making the endothermic reaction cooler than its surroundings. This can be compared to how an ice cube melting requires heat as a reactant.

In an exothermic reaction, heat is a product, making the exothermic reaction hotter than its surroundings. This is compared to how a fire releases heat into the air as a product.