Chemical energy

Definition

Chemical energy is the potential energy stored within chemical bonds of molecules. It is released or absorbed during chemical reactions.

5 Must Know Facts For Your Next Test

1. Chemical energy is a form of potential energy that can be converted into other forms such as thermal, electrical, and kinetic energy.
2. In a closed system, the conservation of energy principle applies to chemical reactions; the total amount of energy remains constant.
3. Exothermic reactions release chemical energy, often in the form of heat or light.
4. Endothermic reactions absorb energy from their surroundings to proceed.
5. Fuels such as gasoline and food are common examples where chemical energy is stored and later converted for practical use.

Review Questions

• What happens to chemical energy during an exothermic reaction?
• How does the conservation of energy principle apply to chemical reactions?
• Name two everyday examples where chemical energy is stored and later converted.

Related terms

Potential Energy:

The stored energy in an object due to its position in a force field or its configuration.

Exothermic Reaction: A type of chemical reaction that releases heat into the surroundings.

Endothermic Reaction: A type of chemical reaction that absorbs heat from its surroundings.