This memory aid covers Memory Aids within Bond Energies (HT) for GCSE Chemistry. Revise Bond Energies (HT) in Energy Changes for GCSE Chemistry with 25 exam-style questions and 15 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 11 of 15 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 11 of 15
Practice
25 questions
Recall
15 flashcards
🧠 Memory Aids
Breaking = Bad (needs energy), Making = Magic (releases energy)
This is the most important thing to remember for bond energy questions. Break = ENDO (energy in). Make = EXO (energy out).
The formula: "IN minus OUT" = ΔH
ΔH = energy IN (breaking) − energy OUT (making)
If ΔH is negative → more OUT than IN → exothermic (more energy released than absorbed)
If ΔH is positive → more IN than OUT → endothermic (more energy absorbed than released)
Double check rule: "Negative ΔH = nice and warm (exothermic). Positive ΔH = pulls energy from surroundings (endothermic)."
Keep building this topic
Read this section alongside the surrounding pages in Bond Energies (HT). That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Bond Energies (HT)
Which statement correctly describes the energy change when chemical bonds are broken?
Explain how you would determine, from a bond energy calculation, whether a reaction is exothermic or endothermic.
Quick Recall Flashcards
25 questions on Bond Energies (HT) — practise free
Instant marking, adaptive difficulty, and 15 spaced repetition flashcards. Free until your GCSEs.
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