Key term for Edexcel GCSE Chemistry, used in Heat Energy Changes.
The overall energy change in a reaction, calculated as the difference between the total energy absorbed to break bonds and the total energy released making bonds.
Enthalpy change (ΔH) appears in Edexcel GCSE Chemistry revision content for Rates of Reaction and Energy Changes, especially Heat Energy Changes and Mathematical Applications.
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Rates of Reaction and Energy Changes
Rates of Reaction • Definition of Catalyst
