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5.1 Exothermic and endothermic reactions

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Question 24
H

The thermal decomposition of calcium carbonate is endothermic. Which statement about the bonds in this reaction is correct?

[1]
A

The energy released forming the bonds in the products is the greater quantity

B

The energy needed to break the bonds in calcium carbonate is the greater quantity

C

No bonds are broken, so all the energy taken in is used to form new bonds

D

The overall energy change is negative because energy is taken in from outside

Markscheme

5.1 Exothermic and endothermic reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Exothermic and endothermic reactions

39 exam-style questions on AQA GCSE Chemistry 5.1 Exothermic and endothermic reactions, covering 5.1.1 Energy transfer during exothermic and endothermic reactions, 5.1.2 Reaction profiles, and 5.1.3 The energy change of reactions. Each one has a worked solution and a mark scheme showing where the marks go.

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