Edexcel IGCSE Chemistry 3.6C bond breaking and making
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.
3.6C Bond-breaking is an endothermic process and question 1
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.
The table gives the bond energies.
Explain, in terms of bonds broken and bonds made, why this reaction is exothermic.
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