Learning objective
Interpret reaction profile diagrams.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Flashcards
0
Questions
Topic
Energetics
Subtopic
Enthalpy change
Study support
Understand this objective
Quick explanation
Interpret reaction profile diagrams
- This point belongs to Energetics, especially Enthalpy change.
- You need to be able to interpret reaction profile diagrams.
- The key ideas to know are reaction profile.
- 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 Enthalpy change to exam-style questions, flashcards, and revision notes for Energetics.
Quick student answer
Which of the following statements about enthalpy change (ΔH) is correct?
Direct answer
B) ΔH is the heat content of a system at constant pressure.
Key terms
- Enthalpy (H): A measure of the total energy of a thermodynamic system, including internal energy and the energy associated with pressure and volume.
- Activation Energy (Ea): The minimum amount of energy required to initiate a chemical reaction.
Common trap
Confusing exothermic and endothermic reactions: Remember that exothermic reactions have a negative ΔH (energy released), while endothermic reactions have a positive ΔH (energy absorbed).
Related questions
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Question 1 of 3
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Flashcard prompts
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Flashcard 1 of 3
Revision tools
Choose how to practise
Flashcards0 linked cards
Practice Questions0 linked questions
Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Define enthalpy change under constant pressure.
Enthalpy change
- Distinguish exothermic and endothermic reactions using enthalpy change signs.
Enthalpy change
- Define standard enthalpy changes for formation, combustion and neutralisation where appropriate.
Enthalpy change
- Use q = mcΔT to calculate heat energy transferred.
Calorimetry and enthalpy measurements
- Convert calorimetry data into molar enthalpy changes.
Calorimetry and enthalpy measurements