Drawing Reaction Profiles

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Katelyn B 2E
Posts: 29
Joined: Fri Sep 29, 2017 7:05 am

Drawing Reaction Profiles

Postby Katelyn B 2E » Sat Mar 17, 2018 3:42 pm

Question 15.89 asks you to sketch a reaction profile. I know that you're supposed to take into account whether the reaction is endothermic/exothermic and that each step in a reaction correlates to one "hill". How do you know how large to draw each peak and where the position of substrates and products are on the profile?

Jessica Jones 2B
Posts: 80
Joined: Fri Sep 29, 2017 7:04 am

Re: Drawing Reaction Profiles

Postby Jessica Jones 2B » Sat Mar 17, 2018 3:50 pm

For the amplitudes it will be based on the activation energy. The slowest step will have the highest activation energy and therefore the highest amplitude. The other steps will be lower and you can not be expected to know which of the remaining ones are higher than the other unless they give us values to solve for Ea. For placement of reactants and products, if it is exothermic, reactants are higher than products and for endothermic, products are higher than reactants.

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