AQA GCSE Chemistry
Energy
Atoms, elements, compounds, formulae, equations and the foundations of chemistry.
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Top Tips
- Exothermic - energy out - temperature up
- Endothermic - energy in - temperature down
Additional Resources
📘 Specification
AQA GCSE Chemistry: Energy Changes
The official specification covering exothermic and endothermic
reactions, reaction profiles, activation energy and bond energies.
🔥 Energy Changes
Chemguide: Introducing Energy Changes
A detailed visual introduction to exothermic and endothermic
reactions, energy transfer, bond breaking and bond making,
with energy diagrams and demonstration videos.
🔬 Required Practical
Seneca: Temperature Changes
Review the required practical for measuring temperature changes,
including apparatus, method, variables, analysis and sources
of experimental error.
📈 Reaction Profiles
Seneca: Reaction Profiles
Free interactive revision using energy diagrams to identify
exothermic and endothermic reactions, activation energy and
the overall energy change.
🧮 Bond Energies
Chemguide: Bond Energy Calculations
Step-by-step Higher Tier guidance on bond energies and calculating
overall energy changes from the energy required to break bonds
and released when new bonds form.
🚀 Challenge / Extend
Seneca: Grade 9 Energy Changes
Stretch your understanding with more demanding applications
of energy changes, reaction profiles and bond-energy ideas.
🎲 Quiz
Generate a 10-question quiz on Metals.
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Exam Practice
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⭐ Challenge
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Challenge questions, Grade 8–9 tasks and mastery badges can go here later.