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Chemistry

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    $\begingroup$ Here are two sources (oxford lecture notes and wikibooks) to look into this topic further than the Libretext source cited in the question. $\endgroup$
    – Karsten ♦
    Commented Jul 31, 2023 at 13:59
  • $\begingroup$ It is possible that you are mixing several concepts that are related but are not identical. $\mathrm{E_a}$ stems from the Arrhenius equation that describes the dependence of k(T) with temperature. $\mathrm{E_a}$ is an empirical parameter. ... $\endgroup$
    – PAEP
    Commented Jul 31, 2023 at 17:26
  • $\begingroup$ (cont.) However, for a simple reaction profile that presents a barrier between reactants and products, Fowler and Guggenheim showed that $\mathrm{E_a}$ roghtly corresponds to difference be the average energy of the molecules that react and the average energy of the reactant molecules (see K. J. Laidler, Chemical Kinetics, Pearson,1987). ... $\endgroup$
    – PAEP
    Commented Jul 31, 2023 at 17:27
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    $\begingroup$ By the way you can access Clare Vallance lecture notes through the link provided by @Karsten. I checked it today and yesterday. It is a link to a pdf file, so you need a pdf reader. $\endgroup$
    – PAEP
    Commented Aug 1, 2023 at 13:12
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    $\begingroup$ Please note that the activated complex model is outdated and superseded by transition state theory. $\endgroup$
    – Martin - マーチン ♦
    Commented Aug 2, 2023 at 22:14