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16.69: Pre exponential factor in catalysis

Posted: Thu Mar 15, 2018 4:33 pm
by Chloe1K
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?

Re: 16.69: Pre exponential factor in catalysis

Posted: Thu Mar 15, 2018 10:42 pm
by Janine Chan 2K
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.