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Analyze reaction pathway diagrams that illustrate both exothermic and endothermic reactions.

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Cambridge IGCSE Combined ScienceChemical energeticsSupplement content

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Analyze reaction pathway diagrams that illustrate both exothermic and endothermic reactions

This point belongs to Exothermic and endothermic reactions, especially Exothermic and endothermic reactions outcomes.
You need to be able to analyze reaction pathway diagrams that illustrate both exothermic and endothermic reactions.
The key ideas to know are Analyse.
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Analyse

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This objective helps connect Exothermic and endothermic reactions outcomes to exam-style questions, flashcards, and revision notes for Exothermic and endothermic reactions.

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Paper 4 structured question: Exothermic and endothermic reactions

Paper 4Theory (Extended)3 marks

Diagram Description

Reaction Pathway Diagram

The diagram shows the energy levels of reactants and products, with a clear indication of activation energy and the energy change for the reaction.

a
Analyse the reaction pathway diagram provided, focusing on the energy changes involved in the reaction.
Your answer
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[3]

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Related learning objectives

Explain that an exothermic reaction releases thermal energy to the environment, resulting in a rise in the surrounding temperature.
Exothermic and endothermic reactions outcomes
Explain that an endothermic reaction absorbs thermal energy from the environment, causing a drop in the surrounding temperature.
Exothermic and endothermic reactions outcomes
Define activation energy as the minimum energy required for colliding particles to initiate a reaction.
Exothermic and endothermic reactions outcomes
Create and label reaction pathway diagrams for exothermic and endothermic reactions, including reactants, products, overall energy change, and activation energy.
Exothermic and endothermic reactions outcomes
Recognize that breaking bonds is an endothermic process while forming bonds is an exothermic process.
Exothermic and endothermic reactions outcomes

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