The kinetics of the gas-phase reaction: OH + CH6 HO + CH5 was studied under...

 

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The kinetics of the gas-phase reaction: OH + C₂H6 →→ H₂O + C₂H5 was studied under pseudo-first-order conditions with [C₂H6] >> [OH]. The bimolecular rate coefficient for this reaction at 300 K was found to be k= 2.66 x 10-13 cm³molecule-¹s¹. (a) When [C₂H6] = 4.3 x 10¹5 molecule cm³, show that the half-life of OH is approximately 600 μs. (b) Describe a suitable experimental method to measure the rate coefficient, k, for this reaction over a range of temperatures via monitoring the decay of the OH reactant. Your answer should include a fully labelled sketch of the apparatus, the methods by which OH radicals are generated and detected, and an explanation of how k is obtained from experimental data. The kinetics of the gas-phase reaction: OH + C₂H6 →→ H₂O + C₂H5 was studied under pseudo-first-order conditions with [C₂H6] >> [OH]. The bimolecular rate coefficient for this reaction at 300 K was found to be k= 2.66 x 10-13 cm³molecule-¹s¹. (a) When [C₂H6] = 4.3 x 10¹5 molecule cm³, show that the half-life of OH is approximately 600 μs. (b) Describe a suitable experimental method to measure the rate coefficient, k, for this reaction over a range of temperatures via monitoring the decay of the OH reactant. Your answer should include a fully labelled sketch of the apparatus, the methods by which OH radicals are generated and detected, and an explanation of how k is obtained from experimental data.

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