Page 1 of 1

Reaction Profiles

Posted: Sun Mar 10, 2019 4:58 pm
by Shuyi Yu 1B
How can we tell from a reaction profile whether a reaction is spontaneous? I understand that it must be energetically favorable, but at what point is the activation energy low enough? Do we just assume that it is low enough when the hump is relatively low?

Re: Reaction Profiles

Posted: Sun Mar 10, 2019 5:25 pm
by David S
The adjective "spontaneous" is specifically used in this case to describe a reaction with a negative delta G (Greactant > Gproduct). The activation energy has to do with kinetics, which only has to do with rates of reaction, so you dont have to pay attention to it when determining whether a rxn is favorable (spontaneous).

Re: Reaction Profiles

Posted: Sun Mar 10, 2019 5:26 pm
by armintaheri
The activation energy doesn't matter. A reaction is spontaneous when the products have lower energy than the reactants, making negative.