Interactive Profile Diagrams

Part of Reaction Profiles ¡ Section 3 of 13

DiagramUnit: Energy ChangesGCSE

Exothermic Reaction

Progress of reaction Energy Reactants Products Ea ΔH

Products LOWER than reactants
ΔH is negative

Endothermic Reaction

Progress of reaction Energy Reactants Products Ea ΔH

Products HIGHER than reactants
ΔH is positive

This diagram covers Interactive Profile Diagrams within Reaction Profiles for GCSE Chemistry. Revise Reaction Profiles in Energy Changes for GCSE Chemistry with 28 exam-style questions and 15 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 3 of 13 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Practice questions for Reaction Profiles

What does activation energy represent on a reaction profile?

  • A. The minimum energy particles need to react
  • B. The total energy released during the reaction
  • C. The energy stored in the reactants
  • D. The difference in energy between products and reactants
1 markfoundation

Explain how a catalyst affects the activation energy shown on a reaction profile. [2 marks]

2 marksstandard

Quick recall flashcards

What is activation energy?
The minimum energy particles need to react when they collide
What does the y-axis show on a reaction profile?
Energy

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