|May20-12, 05:12 PM||#1|
Exponent value in Arrhenius Equation
This may be a pretty dumb question, but how is it that as the exponent value of e decreases, the rate k increases? This seems counter-intuitive, and when I enter values for e into my calculator and compare them, the higher exponents (e.g. 50 vs. 20) give higher results.
|May20-12, 05:43 PM||#2|
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The Arrhenius equation is
k = A*e-Ea/RT
where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature (in Kelvin). What are you changing to get the exponential factor to change?
ETA - Also, don't forget the properties of exponents. For the real numbers a and b , where a ≠ 0, one has a-b = 1/ab.
Hopefully it's becoming a bit more clear with those reminders!
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