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Experiment 15
Kinetics:
Rates of Reaction and Activation Energies
CALCULATIONS/SET-UPS
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Temperature, K
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˚C + 273
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Rate Constant, k
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Zero Order
Reaction: k =
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-{[Ct] – [Co]} / Δt
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First Order
Reaction: k =
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-{ln[Ct] – ln [Co]}/ Δt
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Second Order
Reaction: k =
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{1/[Ct] – 1/[Co]}/ Δt
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Activation
Energy, Ea =
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-R(slope of Arrhenius
graph)
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Half-life (t½)
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Required for
post-lab problem 1
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Zero Order
Reaction: t½ =
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[Co]
/ 2k
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First Order
Reaction: t½ =
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Ln 2/ k
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Second Order
Reaction: t½ =
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1/ k[Co]
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Ct =
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Concentration at
time t
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Co =
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Initial concentration
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