Neco Model Questions Vol1 2020 Chemistry Question 24
Practice objective / multiple choice question 24 from the 2020 Neco Model Questions Vol1 Chemistry examination.
The oxidation of a primary alcohol \(\mathrm{RCH_{2}OH}\) to the corresponding aldehyde \(\mathrm{RCHO}\) by \(\mathrm{Na_{2}Cr_{2}O_{7}}\) in acidic medium follows first‑order kinetics. At 298 K the rate constant is \(k_{1}=2.5\times10^{-4}\ \text{s}^{-1}\). When the temperature is raised to 308 K the observed half‑life is 5.0 min. Determine the activation energy \(E_{a}\) in kJ·mol\(^{-1}\). (R = 8.314 J·mol\(^{-1}\)·K\(^{-1}\))
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This is Neco Model Questions Vol1 2020 Chemistry Question 24. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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