Chem_208_06_2007_web

Chem_208_06_2007_web - Today Starting Chemical Kinetics Ch...

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Today: Starting Chemical Kinetics- Ch. 14.1-14.3 PS3 Assigned Today; PS2 Due Tomorrow at 2 PM. Please include Your Name, Lab TA Name, and Lab Day on Homework.
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Chapter 14: Kinetics • Questions: – How rapidly does a reaction proceed? – How do reactions occur on the molecular scale? – What variables affect the rates of chemical reactions? Demo: Briggs-Rauscher Oscillating Reaction Reaction is complex; most important reactions are: 5H 2 O 2 + 2IO 3 - + 2H + I 2 + 5O 2 + 4H 2 0 5H 2 O 2 + I 2 2IO 3 - + 2H + + 4H 2 0 _______________________________ Overall: 2H 2 O 2 (aq) O 2 (g) + H 2 O(l)
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Thermal Decomposition of NO 2 2NO 2 (g) 2NO(g) + O 2 (g)
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Thermal Decomposition of NO 2 2NO 2 (g) 2NO(g) + O 2 (g) -4.2 x 10 -5 2.2 x 10 -5 1.4 x 10 -5 -2.8 x 10 -5 4.2 x 10 -5 2.8 x 10 -5 Ave Rate (M/s) Ave Rate (M/s) Ave Rate (M/s)
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2NO 2 (g) 2NO(g) + O 2 (g) 1.4 x 10 -5 -2.8 x 10 -5 2.8 x 10 -5 Ave Rate (M/s) Ave Rate (M/s) Ave Rate (M/s) 0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0 50 100 150 200 250 300 350 400 Time (s) Conc. (M) [NO 2 ] t = -2.8x10 -5 M/s Average Rate [O 2 ] [NO] t t = 2.8x10 -5 M/s = 1.4x10 -5 M/s
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Defining Reaction Rates
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Chem_208_06_2007_web - Today Starting Chemical Kinetics Ch...

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