Learning objective
(HT only) State that energy must be supplied to break bonds in reactants.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Exothermic and endothermic reactions
Subtopic
The energy change of reactions (HT only)
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Quick explanation
(HT only) State that energy must be supplied to break bonds in reactants
- This point belongs to Exothermic and endothermic reactions, especially The energy change of reactions (HT only).
- You need to be able to (HT only) State that energy must be supplied to break bonds in reactants.
- The key ideas to know are HT only.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect The energy change of reactions (HT only) to exam-style questions, flashcards, and revision notes for Exothermic and endothermic reactions.
Quick student answer
What should you know about (HT only) State that energy must be supplied to break bonds in reactants?
Direct answer
In Chemistry, this page helps you answer questions about (HT only) State that energy must be supplied to break bonds in reactants within Exothermic and endothermic reactions. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are Bond breaking and Exothermic reaction.
Key terms
- Bond breaking: The process of supplying energy to overcome the forces holding atoms together in a molecule.
- Exothermic reaction: A chemical reaction that releases energy to the surroundings, resulting in an increase in temperature.
Common trap
Confusion about Bond Breaking: Remember that breaking bonds requires energy input, while forming bonds releases energy. Focus on the distinction between these processes.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- State that energy is conserved in chemical reactions.
Energy transfer during exothermic and endothermic reactions
- Explain that a reaction transferring energy to the surroundings leaves products with less energy than the reactants by the amount transferred.
Energy transfer during exothermic and endothermic reactions
- Define an exothermic reaction as one that transfers energy to the surroundings.
Energy transfer during exothermic and endothermic reactions
- Explain that the temperature of the surroundings increases during an exothermic reaction.
Energy transfer during exothermic and endothermic reactions
- Identify combustion, many oxidation reactions and neutralisation as examples of exothermic reactions.
Energy transfer during exothermic and endothermic reactions