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.
At a glance
5
Flashcards
7
Questions
Topic
Exothermic and endothermic reactions
Subtopic
The energy change of reactions (HT only)
Study support
Understand this objective
Short explanation
(HT only) State that energy must be supplied to break bonds in reactants. This objective belongs to The energy change of reactions (HT only) within Exothermic and endothermic reactions for AQA GCSE Chemistry 8462. A strong answer should use HT only accurately, explain the chemistry behind the statement, and connect the idea back to the exact command in the objective. When revising, separate this point from neighbouring Chemistry ideas by naming the relevant particle, substance, process, calculation, observation, or structure before giving the final conclusion.
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.
Common mistakes
1 linked- Confusion about Bond Breaking: Remember that breaking bonds requires energy input, while forming bonds releases energy. Focus on the distinction between these processes.
Revision tools
Choose how to practise
Flashcards5 linked cards
Flashcard 1 of 5
Practice Questions7 linked questions
Question 1 of 7
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Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
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