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5.1 Exothermic and endothermic reactions

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Question 28
H

A reaction has an overall energy change of -250 kJ/mol. Which statement about the reaction profile for this reaction is correct?

[1]
A

The products are drawn 250 kJ/mol250\ \text{kJ/mol}250 kJ/mol higher in energy than the reactants

B

The activation energy of this reaction must be equal to 250 kJ/mol250\ \text{kJ/mol}250 kJ/mol

C

The peak of the curve is drawn 250 kJ/mol250\ \text{kJ/mol}250 kJ/mol above the products line

D

The products are drawn 250 kJ/mol250\ \text{kJ/mol}250 kJ/mol lower in energy than the reactants

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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