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Brainlag Learn / GCSE Chemistry

Energy changes

Exothermic and endothermic reactions, the temperature change practical, reaction profiles, bond energies, cells and fuel cells.

Lessons

  1. Exothermic and endothermic reactionsReactions that warm or cool their surroundings, where the energy goes, and everyday uses of both. 15 min, free
  2. Required practical: temperature changesMeasuring the temperature change of a reaction in an insulated cup, the variables, repeats and the two-line graph. 20 min, free
  3. Reaction profilesEnergy level diagrams, activation energy, the sign of ΔH and what a catalyst changes. 20 min, Plus
  4. Bond energiesCalculating the energy change of a reaction from the energies of the bonds broken and made. 25 min, Plus, Higher tier
  5. Chemical cells and fuel cellsVoltage from two metals of different reactivity, batteries, rechargeable cells, and the hydrogen fuel cell. 20 min, Plus, Chemistry only

Practise and test

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