Neco 2022 Chemistry Question 22
Practice objective / multiple choice question 22 from the 2022 Neco Chemistry examination.
A 0.50‑mol mixture of the two structural isomers of C\(_5\)H\(_{12}\) (n‑pentane and isopentane) is completely combusted in excess O\(_2\). The combustion of pure n‑pentane releases 3500 kJ mol\(^{-1}\) and that of pure isopentane releases 3400 kJ mol\(^{-1}\). The mixture releases a total of 1725 kJ on combustion. Determine the mole fraction of n‑pentane in the mixture.
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About This Question
This is Neco 2022 Chemistry Question 22. It is one of the objective questions from the 2022 Neco Chemistry examination.
Difficulty level: Medium .
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