arrhenius equation

Arrhenius Equation:

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juchung7
Posts: 44
Joined: Fri Sep 29, 2017 7:05 am

arrhenius equation

Postby juchung7 » Mon Mar 19, 2018 12:21 am

What is the value of A exactly? What does it stand for/mean in terms of rates and the rate constant?

Minie 1G
Posts: 63
Joined: Fri Sep 29, 2017 7:04 am

Re: arrhenius equation

Postby Minie 1G » Mon Mar 19, 2018 3:15 am

A is the pre-exponential factor. It is the fraction of molecules that would react if the activation energy was zero (if Ea is 0, e^0/RT would be 1 so your arrhenius equation would be k=a).

A is usually determined with experimental data, since it's different for different reactions.


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