Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

The combustion of methane is exothermic. $\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}$ Which of the following statements about this reaction is correct?

  • AThe energy needed to break the bonds in methane and oxygen is greater than the energy released in making new bonds in carbon dioxide and water.
  • BThe energy needed to break the bonds in methane and oxygen is less than the energy released in making new bonds in carbon dioxide and water.
  • CThe energy released in breaking bonds in methane and oxygen is greater than the energy needed to make new bonds in carbon dioxide and water.
  • DThe energy released in breaking bonds in methane and oxygen is less than the energy needed to make new bonds in carbon dioxide and water.

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