Lesson_27 - Lesson 27 Method of the initial rates In the...

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Unformatted text preview: Lesson 27 Method of the initial rates In the method of initial rates, the instantaneous rate of reaction is determined at the beginning of the reaction, before reactant concentrations have changed significantly Consider the reaction: m n NO NH k r t NH ] [ ] [ d ] [ d 2 4 4- + + = =- Lesson 27 Method of the initial rates [NH 4 + ] o [NO 2- ] o r o (mol/L.s) 1 0.1 M 0.005 M 1.35 10-7 2 0.1 M 0.01 M 2.7 10-7 3 0.2 M 0.01 M 5.4 10-7 The following set of experimental data was measured : The superscript o indicates initial conditions Lesson 27 Method of initial rates: Determining reaction orders = = = = =- +- + 1 5 . 5 . 01 . 005 . ) 01 . ( ) 005 . ( 7 . 2 35 . 1 ] [ ] [ ] [ ] [ 2 2 2 4 1 2 1 4 2 1 m NO NH k NO NH k r r m m m m m n m n = = = =- +- + 1 2 2 1 ....
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This note was uploaded on 04/13/2009 for the course CHEMISTRY 102 taught by Professor Soares during the Spring '09 term at Waterloo.

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Lesson_27 - Lesson 27 Method of the initial rates In the...

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