Integrated Rate Graphs - 2 (k = slope of line) Examples For...

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4/9/10 2:34 PM Integrated Rate laws Page 1 of 2 http://www.chem.purdue.edu/gchelp/howtosolveit/Kinetics/IntegratedRateLaws.html Rate Laws from Graphs of Concentration Versus Time (Integrated Rate Laws) In order to determine the rate law for a reaction from a set of data consisting of concentration (or the values of some function of concentration) versus time, make three graphs. [A] versus t (linear for a zero order reaction) ln [A] versus t (linear for a 1 st order reaction) 1 / [A] versus t (linear for a 2 nd order reaction) The graph that is linear indicates the order of the reaction with respect to A. Then, you can choose the correct rate equation: For a zero order reaction, rate = k (k = - slope of line) For a 1 st order reaction, rate = k[A] (k = - slope of line) For a 2 nd order reaction, rate = k[A]
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Unformatted text preview: 2 (k = slope of line) Examples For a zero order reaction, as shown in the following figure, the plot of [A] versus time is a straight line with k = - slope of the line. Other graphs are curved for a zero order reaction. For a first order reaction, as shown in the following figure, the plot of the logrithm of [A] versus time is a straight line with k = - slope of the line. Other graphs are curved for a first order reaction. 4/9/10 2:34 PM Integrated Rate laws Page 2 of 2 http://www.chem.purdue.edu/gchelp/howtosolveit/Kinetics/IntegratedRateLaws.html For a second order reaction, as shown in the following figure, the plot of 1 / [A] versus time is a straight line with k = slope of the line. Other graphs are curved for a second order reaction. Top...
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This note was uploaded on 11/19/2010 for the course CHEM 204 taught by Professor Gruebele during the Spring '08 term at University of Illinois, Urbana Champaign.

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Integrated Rate Graphs - 2 (k = slope of line) Examples For...

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