#209
4.6.2.6 The effect of temperature changes on equilibrium (HT only)
Paper 2 · Triple only
Spec reference: 4.6.2.6 (under 4.6.2).
What you need to know
- that a faster reaction is taking place. Remember, the
- steeper the line, the faster the reaction.
- To calculate the reaction rate at a specific time
- surface area to volume ratio.
- particles, therefore, increasing the rate of the
- period, construction lines must first be drawn on the
- reaction.
- straightest part of the graph.
KO match: of Equilibrium (Higher Tier Only)
Support videos
- FreeScienceLessons (topic playlist): (use links below)
- PMT videos hub (Rate & extent): https://www.physicsandmathstutor.com/chemistry-revision/gcse-aqa/rate-and-extent-of-chemical-change/
Self-assessment (checklist)
- I can evaluate uses and applications of exothermic and
Key steps (method)
- Identify what the question is testing and use precise chemistry vocabulary.
- If it’s a calculation: write the equation/formula first, then substitute carefully.
Common mistakes
- Missing units/state symbols when asked.
- Giving a statement without linking cause → effect.
Exam-style questions (quick)
- Define the key term(s) for this point in the spec.
- Explain a typical property/result using particle/bonding ideas.
- Do a short calculation or interpretation step relevant to this point.
Practice questions
- PMT: Rate & extent (questions + notes): https://www.physicsandmathstutor.com/chemistry-revision/gcse-aqa/rate-and-extent-of-chemical-change/