Pre Equilibrium Approach

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Elina Vanuska 2B
Posts: 10
Joined: Fri Sep 25, 2015 3:00 am

Pre Equilibrium Approach

Postby Elina Vanuska 2B » Sun Feb 14, 2016 12:09 am

Hi there!

I have a question regarding the pre equilibrium approach versus the steady state approach. Under what conditions is the pre-equillibrium approach used? Is it used as often as the steady state approach?

Thanks!

Chem_Mod
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Re: Pre Equilibrium Approach

Postby Chem_Mod » Sun Feb 14, 2016 1:44 am

Steady-state is more general and can be used whenever intermediates remain low in concentration (basically all the time, since intermediates are unstable). Pre-equilibrium can only be used when a slow step is preceded by a fast step. The slow step's reverse is negligible and the fast step is in equilibrium.

Michelle Choi 1H
Posts: 8
Joined: Tue Nov 17, 2015 3:00 am

Re: Pre Equilibrium Approach

Postby Michelle Choi 1H » Sun Feb 14, 2016 4:07 pm

Should we know how to use steady-state approaches? The pre equilibrium approach was already discussed in lecture but unless the steady state will be covered later do you advise that we study both?


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