Lecture-23 - Chem111 Fall, 2005 Lecture 23: Kinetics...

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Chem111 Fall, 2005 kinetics-9 We ended the last lecture with a tool for using experiments to determine kinetic rate laws … now the details of how to do this! the initial rate method uses differential rate laws the graphical method uses the integrated rate laws Initial Rate Method Basic steps 1. measure the initial rate of a reaction under several different initial concentration conditions 2. compare the initial rates measured to dissect out Æ the orders with respect to each of the reactants Æ the overall order of the reaction Æ the rate constant k for the reaction Initial rate . Lecture 23: Kinetics Experimental Determination of Rate Laws Æ Initial Rate Method Graphical Method Half-lives [A] t
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Chem111 Fall, 2005 kinetics-10 Example : Consider a reaction between NO and H 2 performed in a sealed glass bulb determine the orders of this reaction with respect to N O a n d H and the rate constant for this reaction 2 NO (g) + 2 H 2 (g) Æ N 2 (g) + 2 H 2 O (g) 4 moles of gas 3 moles of gas Æ can use the total pressure to monitor the progress of
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Lecture-23 - Chem111 Fall, 2005 Lecture 23: Kinetics...

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