Ju O.
asked • 03/06/23Question about chemistry graph
How would you determine the apparent rate constant, k' of a first order graph?
How would you determine Frequency factor, A. from a Arrhenius plot?
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1 Expert Answer
Kathryn A. answered • 03/15/23
Tutor
5.0
(141)
PhD in Chemistry with 7 years of teaching experience in Organic Chem
The rate constant of a first order graph is equal to the negative of the slope of the line.
A first order reaction is:
Rate = k[A] and plotting ln A vs. time gives a slope that is -k
The arrhenius factor is the intercept of an arrhenius plot. SImply check out ln K vs 1/T! the intercept is ln A!
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Stanton D.
Well, how would you do it? Make your rate equation, put a couple of points on a "first order graph" (whatever you think that is), and calculate the slope (rise/run, remember?). For the Arrhenius plot, do the same thing, with points from a couple of different temperatures. You'll have to be a little careful on your axis units, obviously. You can carry variables like [A] and [A + deltaA] through equations, as well as T and T+deltaT?03/06/23