Chemical Kinetics Equations

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Last updated 11:01 PM on 8/25/26
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16 Terms

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Generic Rate of reaction

-dA/adt=-dB/bdt=dC/cdt=dD/ddt

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Rate Law

rate=k[A]x[B]y

3
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Zero Order Integrated Rate Law

[A]t=-kt+[A]0

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Zero Order Half Life

t1/2=[A]0/2k

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1st Order Integrated Rate Law

ln[A]t=-kt+ln[A]0

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Half Life of 1st Order Reaction

t1/2=(ln2)/k

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2nd Order Integrated Rate Law

1/[A]t=kt+1/[A]0

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2nd Order Half Life

t1/2=1/k[A]0

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Arrhenius Equation

k=Ae-Ea/RT

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Arrhenius Equation Rearranged for 3 or more points

lnk=-Ea/RT+lnA

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Arrhenius Equation Rearranged for 2 points

lnk1/lnk2=(Ea/R)(1/T2-1/T1)

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Arrhenius Equation Slope

-Ea/R=(lnk2-lnk1)/(1/T2-1/T1)

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R for Activation Energy

8.314×10-3 or 0.008314

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k Units for a Zero Order Reaction

M/s or Ms-1

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k Units for a 1st Order Reaction

s-1

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k Units for a 2nd Order Reaction

M-1s-1