Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

Methane reacts with oxygen to produce carbon dioxide and water. $\text{CH}_4(g) + 2\text{O}_2(g) \rightarrow \text{CO}_2(g) + 2\text{H}_2\text{O}(l)$. The bond energies are given below. What energy change does this reaction have?

  • A$-818\ \text{kJ/mol}$
  • B$-102\ \text{kJ/mol}$
  • C$+102\ \text{kJ/mol}$
  • D$+818\ \text{kJ/mol}$

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