011609 - Rate Law The value of the rate constant depends on...

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Rate Law y The value of the rate constant depends on how the rate is defined.
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Rate Law: A Summary y 2 types of rate laws: differential and integrated y rate laws will only involve reactants because only considering conditions where reverse reaction is negligible y determination of either rate law is sufficient to determine the other y important to know the rate law for a reaction because can infer the individual steps involved in the reaction from the rate law
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Determining the Form of the Rate Law y Consider the reaction: { 2 N 2 O 5 (soln) Æ 4 NO 2 (soln) + O 2 (g) { We are given the following information: [N 2 O 5 ] (mol/L) Rate (mol/L*s) 0.90 5.4 x 10 -4 0.45 2.7 x 10 -4
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Method of Initial Rates y Initial Rate – rate taken just after the reaction has begun and there are not enough products to for the reverse reaction to occur y Method of Initial Rates – determining the rate law from the data giving the initial rates at varying concentrations of reactants
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Method of Initial Rates y Initial rate data at 25 o
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This note was uploaded on 02/09/2009 for the course CHEM 105BLG taught by Professor Parr during the Spring '08 term at USC.

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011609 - Rate Law The value of the rate constant depends on...

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