Chemical Forums
Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: nokia8650 on February 05, 2008, 01:55:42 PM
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In arrhenius' equation, given the units of the rate constant, how does onework out the units of A, the frequency factor? Ea is in J/Mol, R is in J/K/Mol, and T is in K.
Also, please can you give an example of finding the units of A!
Thanks
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Arrhenius' equation states that:
k = Ae-Ea/RT
Note that Ea has units of energy and RT also has units of energy, so the exponential is a dimensionless quantity. This means that A has the same units as k. The units of k depend on the particular rate law of the reaction you're studying.