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#14 - Chem 165 Chapter 13 Chemical Kinetics The how of...

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Chem 165 Class 14 Objectives today: 1. Discuss catalysts and their effects on reaction mechanisms Text: Chapter 13: Section 6; Next class: Chapter 23: Section 1 – 4 Caption : Schematic depiction of the industrial Haber- Bosch process, in which molecular hydrogen (H 2 ) and nitrogen (N 2 ) react to form ammonia (NH 3 ). Invented in 1909, this process is still used worldwide to produce over 500 million tons of artificial fertilizer every year [ Science 297 , 1654 (2002)]. The use of a heterogeneous catalyst in this process greatly increases the rate of this overall reaction. (mechanism) Chapter 13: Chemical Kinetics: The ‘how’ of chemical reactions Suggested End-of-chapter problems for Sections 13.5 – 13.6: Chapter 13: 45, 47, 50, 51, 53, 54, 62, 83, 93 a) & b), 110 -How: reactants evolve into products
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Chem 165 Class 14 Histogram from Exam 2 Avg: 73.2 Hi: 105 Std. Dev.: 15.7 Lo: 29 Answer Key and your scores will be available later today through WebCT 0 2 4 6 8 10 12 14 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105
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Chem 165 Class 14 The reaction 2 A + 2 B C + D proceeds by this mechanism: 2 A ' A 2
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