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Edexcel IGCSE Chemistry 3 6c Bond Breaking Is an Endothermic Process and Questions

Practise bond-energy explanation questions by comparing energy taken in to break bonds with energy released when new bonds form.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • Explain that bond breaking is endothermic and bond making is exothermic.
  • Compare energy taken in and released to justify why a reaction is exothermic.

Edexcel IGCSE Chemistry 3 6c Bond Breaking Is an Endothermic Process and Questions question 1

[Maximum number: 2]

Gaseous ethanol is manufactured by reacting ethene gas with steam.

This is the equation for the reaction.

The equation shows the displayed formulae for the reactants and products.

Figure for Question Edexcel IGCSE Chemistry 3 6c Bond Breaking Is an Endothermic Process and Questions question 1 — Edexcel IGCSE Chemistry

The table gives the bond energies.

Table for Question Edexcel IGCSE Chemistry 3 6c Bond Breaking Is an Endothermic Process and Questions question 1 — Edexcel IGCSE Chemistry

Explain, in terms of bonds broken and bonds made, why this reaction is exothermic.

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