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5.1 Exothermic and endothermic reactions

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Question 10

In a combustion reaction, the reactants have an energy of 860 kJ/mol and the products have an energy of 615 kJ/mol.

Which value is the overall energy change for this reaction?

[1]
A

+245 kJ/mol+245\ \text{kJ/mol}+245 kJ/mol

B

−245 kJ/mol-245\ \text{kJ/mol}−245 kJ/mol

C

+1475 kJ/mol+1475\ \text{kJ/mol}+1475 kJ/mol

D

−1475 kJ/mol-1475\ \text{kJ/mol}−1475 kJ/mol

Markscheme

5.1 Exothermic and endothermic reactions Questions

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

85 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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