Chemical reactions
What Chemical reactions means in Combined Science GCSE, as defined for AQA.
Definitions of Chemical reactions
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Reference: AQA
Processes that always involve the formation of one or more new substances and often involve a detectable energy change.
When hydrocarbon fuels burn, they react with oxygen from the air and release energy, usually as heat and light.
Topics that use Chemical reactions
- Atoms, elements and compounds (AQA GCSE)
- Properties of hydrocarbons (AQA GCSE)
Related terms
- Arrow
- Balancing
- Boiling point
- Chemical symbols and names
- Coefficients
- Combustion products
- Complete combustion
- Compounds
Using Chemical reactions in the exam
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