Why does a potential energy diagram showing the effect of a catalyst on activation energy not move left on the reaction pathway scale (compared to uncatalysed reaction) if a catalyst speeds up reactions?


closed as unclear what you're asking by Mithoron, Todd Minehardt, andselisk, airhuff, Geoff Hutchison Dec 29 '17 at 23:39

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    $\begingroup$ You might be imagining that we all have the same textbook as you, opened on the same page, and are looking at the same picture as you. I hate to break it to you, but this is not so. $\endgroup$ – Ivan Neretin Dec 29 '17 at 14:31
  • $\begingroup$ You should provide the diagram. To do this, take a clear photo of the picture, and then upload it by using the image upload option that appears on the top bar when editing or posting the question. $\endgroup$ – Shoubhik Raj Maiti Dec 29 '17 at 15:13
  • $\begingroup$ Hi, sorry, this is the first time I've used this sight. I am not a chemistry expert by any means; I'm just sitting higher. I have got the answer now though. $\endgroup$ – Catlover333 Dec 29 '17 at 17:13

Because the reaction coordinate does not indicate speed. It represents a certain state of the reaction (e.g. 50 % completed) but it does not have any information about time in it.

Therefore the higher reaction speed is not represented in those diagrams.


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