15.65  [ENDORSED]

Arrhenius Equation:

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Parsia Vazirnia 2L
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Postby Parsia Vazirnia 2L » Sat Mar 04, 2017 5:03 pm

Could someone please explain to me part C of number 65 on chapter 15 homework? Why would increasing the temperature increase the rate constant of the reaction with the higher activation barrier more than it will the rate constant of the reaction with the lower energy barrier?

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Re: 15.65  [ENDORSED]

Postby Alyssa_Hsu_2K » Sat Mar 04, 2017 9:53 pm

I was wondering about that as well.
Is it because K=Ae^(Ea/RT)
Hence, the larger the Ea, the the larger the increase in K when T is raised?

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Re: 15.65

Postby Chem_Mod » Sun Mar 05, 2017 11:22 am

Yes. At low activation energies, the exponential term is very small and not very dependent on temperature. At high activation energies, the rate is greatly affected by the temperature.

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