lnA: does this y-intercept exist?

Arrhenius Equation:

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Pauline Tze 3B
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lnA: does this y-intercept exist?

Postby Pauline Tze 3B » Tue Mar 07, 2017 11:10 pm

The linear version of the Arrhenius equation is lnk = (-Ea/R)(1/T) + lnA
When you consider the Arrhenius plot, does lnA actually exist as the y-intercept (where (-Ea/R)(1/T) would equal zero)? If so, under what conditions would it exist?

Thank you!

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Re: lnA: does this y-intercept exist?

Postby Hue_Vo_1D » Tue Mar 07, 2017 11:23 pm

There would be no y-intercept (i.e the line will not cross y-axis at lnA) because theoretically, it's impossible to reach the absolute zero temperature of 0K. Also, because 1/T is the x-axis, 1/0 would be undefined.

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