When the reaction is dominated by intraparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as ________________?
Correct answer: A. nD = (n + 1)/2
- A. nD = (n + 1)/2
- B. nD = n/2
- C. nD = n + 1
- D. None of these
Explanation
Under strong intraparticle diffusion control, the effectiveness factor introduces a concentration dependence that changes the observed order to (n + 1)/2. Thus the measured order is lower than the true order for many positive reaction orders.
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