Energy ChangesHigh Exam FrequencyAQA

Reaction Profiles

Revise Reaction Profiles in Energy Changes for GCSE Chemistry with 28 exam-style questions and 15 flashcards. This is a high-frequency exam topic, so students should expect to explain it clearly under timed conditions.

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The Energy Hill

Introduction 2

Reaction Profile Diagrams

Diagram 3

Interactive Profile Diagrams

Diagram 4

How It Works: Reading and Drawing Reaction Profiles

How It Works 5

Deep Dive: Activation Energy

Deep Dive 6

Exothermic vs Endothermic Reaction Profiles

Comparison 7

Key Facts: Catalysts and Activation Energy

Key Facts 8

Key Definitions

Definitions 9

Common Misconceptions

Misconceptions 10

Memory Aids

Memory Aid 11

Exam Focus

Exam Focus 12

Exam Tips for Reaction Profiles

Exam Tips 13

Knowledge Organiser: Reaction Profiles

Summary

Sample 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

Exam 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

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