## 16.69: Pre exponential factor in catalysis

Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$

Chloe1K
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Joined: Fri Sep 29, 2017 7:05 am

### 16.69: Pre exponential factor in catalysis

What does it mean when the textbook questions say "in practice, the new pathway also has a different pre-exponential factor"? If this means that A for the new pathway with the catalyst changes, how does it cancel out when we try to find Ea?

Janine Chan 2K
Posts: 71
Joined: Fri Sep 29, 2017 7:04 am

### Re: 16.69: Pre exponential factor in catalysis

I think it's just that when doing the problems, we can assume A is the same and that they cancel out, but in real life A is actually different.

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