Decomposition Reactions

Definition

Decomposition reactions are chemical reactions in which a single compound breaks down into two or more simpler substances. This type of reaction is represented by the general equation: AB → A + B

Key points

1. Breakdown of compounds: Decomposition reactions involve the breaking down of a complex molecule into simpler molecules, atoms, or ions. These reactions essentially reverse synthesis reactions.

2. Energy release: Many decomposition reactions require an energy input, such as heat, electricity, or light. However, once initiated, some decomposition reactions can release energy.

Examples

Common examples of decomposition reactions include the decomposition of hydrogen peroxide into water and oxygen (2H₂O₂ → 2H₂O + O₂) and the electrolysis of water into hydrogen and oxygen (2H₂O → 2H₂ + O₂).