Chemistry · May / June 2018 · Paper 11 · Question 16
5070Exothermic and endothermic reactions
The diagram shows the energy profile for a reaction. Which statements about this reaction are correct? 1 More energy is needed to break the bonds than is released when new bonds are formed. 2 Route 1 and route 2 give the same overall equation for the reaction. 3 Route 2 involves the use of a catalyst. 4 The reaction is exothermic.
- A1, 2 and 3
- B1 and 2 only
- C2, 3 and 4
- D3 and 4 only
As printed in the paper
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Correct answer: C. 2, 3 and 4
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