Endothermic & Exothermic

Learn how to tell if a chemical reaction has taken place.

Learn about the special conditions that let some chemical reactions take place.

Things are heating up! Explore the temperature change that occurs in an exothermic reaction and the role of catalysts is this chemistry activity.

When you hurt your ankle, thermodynamics can help you heal! An endothermic reaction reduces the swelling by cooling your injury.

Hydrogen’s tendency towards combustion is what makes it both a dangerous chemical element and a useful energy source.