pseudo thermodynamic parameters

Kristen_Power_1C
Posts: 13
Joined: Wed Nov 18, 2015 3:00 am

pseudo thermodynamic parameters

So I'm having some difficulty understanding how to use the pseudo thermodynamic parameters. What is the whole "pseudo" part mean and how do they operate with organic molecules?

Chem_Mod
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Joined: Thu Aug 04, 2011 1:53 pm
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Re: pseudo thermodynamic parameters

Pseudo-thermodynamic parameters only apply to reactions where there is a transition state indicated with the double daggers. For example you have this type of set up equation: $A+B\rightleftharpoons AB^\ddagger \rightleftharpoons C$. These pseudo-thermodynamic parameters work the exact same way and can use the same equations as we learned earlier in this quarter for regular thermodynamics, so we might not give you the ones that are in the course reader with the double daggers in them. The reason that these values are considered "pseudo" is because they are for a transition state, and transition states are so unfavorable they only exist for an almost infinitesimal amount of time. You can almost say that the transition state doesn't really exist because its lifetime is so short, and that is why thermodynamic values that involve the transition state are considered to be "pseudo".

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