kinetics cont

# kinetics cont - PracticeProblem Ethyl Chloride, CH3CH2Cl2,...

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Ethyl Chloride, CH 3 CH 2 Cl 2 , used to produce tetraethyllead gasoline additive, decomposes, when heated, to give ethylene and hydrogen chloride. The reaction is first order. In an experiment, the initial concentration of ethyl chloride was 0.00100 M. After heating at 500 ° C for 155 s, this was reduced to 0.00067 M. What was the concentration of ethyl chloride after a total of 256 s? Practice Problem 06/06/11 1 t [A] = 0.00052M o t [A] ln = kt (1st order reaction) [A] ( 29   o t [A] 0.00100M ln ln ln 1.492537 [A] 0.400478 0.00067M = = = = = 0.0026 / s t 155s 155 155 k Determine concentration after t = 256 seconds t 0 ln[A] - ln[A] = - t k t 0 ln[A] = ln[A] - t k t ln[A] = ln(0.00100M)-0.0026 / s×256s t ln[A] = -6.90776-0.6656 = -7.57336

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The rate of a reaction increases by a factor of 2.4 when the temperature is increased from 275 ° K to 300 ° K. What is the activation energy of the reaction? Practice Problem
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## This note was uploaded on 06/06/2011 for the course CHEM 3040 taught by Professor Reddy during the Spring '10 term at Taylor's.

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kinetics cont - PracticeProblem Ethyl Chloride, CH3CH2Cl2,...

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