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activation energy

Posted: Mon Feb 15, 2016 4:18 pm
by Dahriel Aron 3A
How can you find the activation energy from just knowing the order of the reaction and k?

Re: activation energy

Posted: Tue Feb 16, 2016 12:05 am
by Chem_Mod
You can find the Ea the value of k at two temperatures using the Arrhenius relation

Re: activation energy

Posted: Tue Feb 16, 2016 6:06 pm
by Dahriel Aron 3A
in using the arrhenius how would you know what to plug in for A?

Re: activation energy

Posted: Wed Feb 17, 2016 3:22 pm
by Anurag Bajjuri 1H
The A value or pre-exponential factor would be given to you in this case if you are trying to find the activation energy. It would also be the y-intercept in a graph of lnk vs 1/T.