Neco Model Questions Vol1 2024 Chemistry Question 39
Practice objective / multiple choice question 39 from the 2024 Neco Model Questions Vol1 Chemistry examination.
Two isomeric alkanes, \(\mathrm{C_6H_{14}}\), are combusted separately. Combusting 1.00 g of n‑hexane releases 8.20 kJ of heat, while 1.00 g of 2‑methylpentane releases 8.05 kJ. Assuming complete combustion to \(\mathrm{CO_2(g)}\) and \(\mathrm{H_2O(l)}\), calculate the difference in standard enthalpy of formation (\(\Delta_f H^\circ\)) between the two alkanes. Use \(\Delta_f H^\circ(\mathrm{CO_2(g)}) = -393.5\) kJ mol\(^{-1}\) and \(\Delta_f H^\circ(\mathrm{H_2O(l)}) = -285.8\) kJ mol\(^{-1}\).
Answer Options
About This Question
This is Neco Model Questions Vol1 2024 Chemistry Question 39. It is one of the objective questions from the 2024 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.