Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

Methane reacts with oxygen to produce carbon dioxide and water. $\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}$ The bond energies are listed in the table below. What is the energy change for this reaction?

  • A$-818\text{ kJ mol}^{-1}$
  • B$-323\text{ kJ mol}^{-1}$
  • C$+323\text{ kJ mol}^{-1}$
  • D$+818\text{ kJ mol}^{-1}$

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