Note AcademyNote Academy
Start

Chemistry · May / June 2022 · Paper 12 · Question 19

5070Alcohols

What is the correct balanced equation and enthalpy change, $\Delta H$, for the complete combustion of butanol, C$_4$H$_9$OH?

  1. AC$_4$H$_9$OH(l) + 5O$_2$(g) $\rightarrow$ 4CO$_2$(g) + 5H$_2$O(g) $\Delta H$ = –2676 kJ / mol
  2. BC$_4$H$_9$OH(l) + 5O$_2$(g) $\rightarrow$ 4CO$_2$(g) + 5H$_2$O(g) $\Delta H$ = +2676 kJ / mol
  3. CC$_4$H$_9$OH(l) + 6O$_2$(g) $\rightarrow$ 4CO$_2$(g) + 5H$_2$O(g) $\Delta H$ = –2676 kJ / mol
  4. DC$_4$H$_9$OH(l) + 6O$_2$(g) $\rightarrow$ 4CO$_2$(g) + 5H$_2$O(g) $\Delta H$ = +2676 kJ / mol

As printed in the paper

Show the answer

Correct answer: C. C$_4$H$_9$OH(l) + 6O$_2$(g) $\rightarrow$ 4CO$_2$(g) + 5H$_2$O(g) $\Delta H$ = –2676 kJ / mol

Sit this whole paper →More on Alcohols

Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.