Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

Carbon monoxide and methanol can combine to produce ethanoic acid. $\text{CO(g)} + \text{CH}_3\text{OH(l)} \xrightarrow{\Delta H_r^{\circ}} \text{CH}_3\text{CO}_2\text{H(l)}$ The table provides standard enthalpy changes of combustion. What value is obtained for $\Delta H_r^{\circ}$ for the reaction between carbon monoxide and methanol?

  • A$-1883.1\,\text{kJ mol}^{-1}$
  • B$-134.9\,\text{kJ mol}^{-1}$
  • C$+134.9\,\text{kJ mol}^{-1}$
  • D$+1883.1\,\text{kJ mol}^{-1}$

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