Home > Chemistry > Chemical Reactions and Equations

Is heat always released during a chemical reaction?

Answer 1

No, heat is not always released during a chemical reaction.

Heat-releasing reactions are called exothermic reactions, and the reaction between calcium chloride and water is an example of one.

But other kinds of reactions are also possible; these are known as endothermic reactions. Endothermic reactions involve the absorption of heat. For example, the reaction between barium hydroxide octahydrate crystals and dry ammonium chloride is endothermic due to the absorption of heat.

Almost all reactions fall into one of two categories: exothermic or endothermic.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Xavier Avery

No, heat is not always released during a chemical reaction. Some reactions absorb heat from the surroundings, resulting in an endothermic reaction.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.