Learning objective
(HT only) Distinguish bond energy calculations from reaction profile interpretation.
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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(HT only) Distinguish bond energy calculations from reaction profile interpretation
- This point belongs to Exothermic and endothermic reactions, especially The energy change of reactions (HT only).
- You need to be able to (HT only) Distinguish bond energy calculations from reaction profile interpretation.
- The key ideas to know are HT only, calculation, and bond energy.
- 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.
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What should you know about (HT only) Distinguish bond energy calculations from reaction profile interpretation?
Direct answer
In Chemistry, this page helps you answer questions about (HT only) Distinguish bond energy calculations from reaction profile interpretation 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 energy calculation and Reaction profile interpretation.
Key terms
- Bond energy calculation: A quantitative method that uses the energies required to break bonds in reactants and the energies released when bonds form in products to determine the overall energy change of a reaction.
- Reaction profile interpretation: A qualitative analysis of a plotted energy diagram that identifies whether a reaction is exothermic or endothermic by comparing the relative energies of reactants, products, and the activation energy.
Common trap
Confusing bond‑energy calculations with reaction‑profile interpretation: Explain that a reaction profile is a qualitative diagram showing the relative energies of reactants, transition state and products, and that it cannot provide numerical bond‑energy values. Bond‑energy calculations use tabulated average energies for specific bonds to determine the overall energy change, while a reaction profile only indicates whether a reaction is exothermic or endothermic and the relative size of the activation energy.
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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