Decomposition reaction — Science definition
Defined in 2 courses:
- A reaction that breaks a larger molecule into smaller ones — a breaking-down reaction. (Life Science: Biology)
- A reaction where a single compound breaks apart into two or more simpler substances (AB → A + B). (Physical Science: Chemistry)
Where it is taught
- Biochemical Reactions & Energy — Investigating the Chemistry of Life, Life Science: Biology, Grade 10
- Types of Reactions — Reactions, Moles & Composition, Physical Science: Chemistry, Grade 11
In use
Its mirror image is the decomposition reaction, AB → A + B, in which a single compound is torn apart into simpler pieces, usually by adding energy as heat or electricity.
Types of Reactions
Questions using decomposition reaction
Problem 1
Explain how a decomposition reaction and a synthesis reaction can be linked together by ATP inside a cell.
Answer and explanation
Energy-releasing metabolism supports ATP production. ATP hydrolysis coupled to synthesis or transport can make the combined process favorable. No energy is created, and the full reactions, not bond breaking alone, determine the balance.
Taught alongside
- chemical reaction
- reactant
- product
- synthesis reaction
- ATP
- metabolism
- single-replacement reaction
- double-replacement reaction
- combustion reaction
- activity series