Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

Carbon monoxide and methanol may react together to produce ethanoic acid. $\text{CO}(g) + \text{CH}_3\text{OH}(l) \xrightarrow[]{\Delta H^{\circ}} \text{CH}_3\text{CO}_2\text{H}(l)$ The table lists the standard enthalpy changes of combustion. $\Delta H_c^{\circ}(\text{CO}) = -283.0\,\text{kJ mol}^{-1}$ $\Delta H_c^{\circ}(\text{CH}_3\text{OH}) = -726.0\,\text{kJ mol}^{-1}$ $\Delta H_c^{\circ}(\text{CH}_3\text{CO}_2\text{H}) = -874.1\,\text{kJ mol}^{-1}$ Determine the value of $\Delta H_r^{\circ}$ 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$+1883.1\,\text{kJ mol}^{-1}$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI