‹ Science Essentials
Energy changes
Exothermic and endothermic reactions, the temperature change practical, reaction profiles, bond energies, cells and fuel cells.
Start: Exothermic and endothermic reactions About 12 min
Lessons
Practice and tests
By the end you can
Classify reactions as exothermic or endothermic and give uses Measure a temperature change and find the end point from a graph Read activation energy and ΔH from a reaction profile Calculate ΔH from bond energies (Higher) Explain cells, batteries and fuel cells (Chemistry only) Helps with: GCSE (AQA, Edexcel, OCR)
Next unit: Rates of reaction and equilibrium Previous unit: Chemical changes: reactivity, acids and electrolysis
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