C3.14: Energy level diagrams 0.0 / 5 ? ChemistryEnergy level diagramsGCSEAQA Created by: HalmkanCCreated on: 04-02-15 20:57 635124 Across 1. Energy changes which are negative show? (10, 9) 4. A catalyst would... the activation energy needed. (5) 5. What does a catalyst provide for a reaction? (9, 7) 6. Energy changes which are positive show? (11, 9) Down 2. What speeds up a reaction? (9) 3. The minimum energy needed for a reaction to start is called the... (10, 6) 6. What diagram can be drawn to represent heat transfer? (6, 5, 7)
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