Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

For carbon dioxide, the enthalpy change of formation is $-394\,\text{kJ mol}^{-1}$, for water it is $-286\,\text{kJ mol}^{-1}$, and for methane it is $-74\,\text{kJ mol}^{-1}$. Calculate the enthalpy change of combustion of methane.

  • A$-892\,\text{kJ mol}^{-1}$
  • B$-606\,\text{kJ mol}^{-1}$
  • C$+606\,\text{kJ mol}^{-1}$
  • D$+892\,\text{kJ mol}^{-1}$

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