Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

The equation for the complete combustion of propan-1-ol is given below. $\text{CH}_3\text{CH}_2\text{CH}_2\text{OH}(l) + 4\frac{1}{2}\,\text{O}_2(g) \rightarrow 3\text{CO}_2(g) + 4\text{H}_2\text{O}(l)$ Standard enthalpy changes of formation are provided. What is the standard enthalpy change of combustion of propan-1-ol, in $\text{kJ mol}^{-1}$?

  • A$-394 - 286 - 303$
  • B$303 - (4 \times 286) - (3 \times 394)$
  • C$394 + 286 - 303$
  • D$(3 \times 394) + (4 \times 286) + 303$

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