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Overview
Energy cycles, entropy and Gibbs free energy for SL and HL. This section will hold the full written explanation for what drives chemical reactions, broken into short, scannable subsections with diagrams, worked examples and definitions where needed.
Key points
- Core definitions and terminology for what drives chemical reactions.
- Worked examples matching the IB exam style.
- Common mistakes examiners flag most often for this topic.
- A short recap summary for last-minute revision.
Practice
Pair this topic with past paper questions from the IB past papers section to check your understanding under exam conditions.