Neco 2020 Chemistry Question 38
Practice objective / multiple choice question 38 from the 2020 Neco Chemistry examination.
Combustion of an unknown alkane \(C_nH_{2n+2}\) releases 48.1 kJ of heat per gram of alkane burnt at constant pressure. Given standard enthalpies of formation: \(\Delta_fH^{\circ}(\mathrm{CO_2}) = -393.5\ \text{kJ mol}^{-1}\), \(\Delta_fH^{\circ}(\mathrm{H_2O(l)}) = -285.8\ \text{kJ mol}^{-1}\), and \(\Delta_fH^{\circ}(\text{alkane}) = -100n\ \text{kJ mol}^{-1}\). Determine the value of \(n\).
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About This Question
This is Neco 2020 Chemistry Question 38. It is one of the objective questions from the 2020 Neco Chemistry examination.
Difficulty level: Medium .
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