Learning objective
(HT only) Explain why a reaction is endothermic when energy needed to break bonds is greater than energy released from forming bonds.
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) Explain why a reaction is endothermic when energy needed to break bonds is greater than energy released from forming bonds
- This point belongs to Exothermic and endothermic reactions, especially The energy change of reactions (HT only).
- You need to be able to (HT only) Explain why a reaction is endothermic when energy needed to break bonds is greater than energy released from forming bonds.
- The key ideas to know are HT only, endothermic, and energy released.
- 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) Explain why a reaction is endothermic when energy needed to break bonds is greater than energy released from forming bonds?
Direct answer
In Chemistry, this page helps you answer questions about (HT only) Explain why a reaction is endothermic when energy needed to break bonds is greater than energy released from forming bonds 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 Endothermic reaction and Bond energy.
Key terms
- Endothermic reaction: A reaction that takes in energy from the surroundings, resulting in a decrease in temperature.
- Bond energy: The energy required to break one mole of bonds in a substance, which influences whether a reaction is endothermic or exothermic.
Common trap
Misunderstanding Endothermic Reactions: Emphasize that an endothermic reaction occurs specifically when the energy required to break bonds is greater than the energy released when new bonds form.
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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