Energy changes

AQA GCSE ChemistryTopic 5 of 105 lessons

Revision notes for Energy changes in AQA Chemistry (8462). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.

1. Energy transfer during exothermic and endothermic reactionsEnergy is conserved in chemical reactions.
2. Reaction profilesA reaction can only happen when reacting particles collide with each other and with enough energy.
3. The energy change of reactions (HT only)In a chemical reaction, energy must be supplied to break the bonds in the reactants.
4. Cells and batteriesA cell contains chemicals that react to produce electricity.
5. Fuel cellsA fuel cell is supplied with a fuel from an external source, such as hydrogen, and with oxygen or air.

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