#12 - hem 165 Class 12 Chapter 13: Chemical Kinetics (the...

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Unformatted text preview: hem 165 Class 12 Chapter 13: Chemical Kinetics (the how of chemical reactions)-How: fast is the reaction? (rates/rate laws) Note: Exam 2 is next Wednesday (2/25) from 6:30-7:30 pm (same rooms/seats) Clicker Review sessions: Sunday, 6 pm, 1002 Gilman Monday, 6 pm, 1352 Gilman (note different room!) ARIS: Chapter 13-A: assignment due Friday (2/20) at 6:00 pm CST Suggested End-of-chapter problems for Sections 13.1 13.4: Chapter 13: 5, 7, 11, 13, 15, 17, 18, 19, 21, 22, 27, 28, 38, 40, 68a&b, 73a&b, 109 Caption: Temperature dependence of reaction rates. (Left) A Cyalume light stick has a bright glow in hot water due to the relatively fast rate of reaction to produce luminescence. (Right) The reaction is significantly slower in cold temperatures, reducing the observed glow. ARIS: Chapter 13-B: assignment due Monday (2/23) at 6:00 pm CST Objectives today: 1. Discuss rate laws and their relationship to the time-dependent concentrations of reactants/products. 2. Consider the temperature dependence of rate constants and the effects of barriers to reactions Text: Chapter 13: Sections 3 4; Next class: Chapter 13: Section 5 emember: WebCT id-term evals. (TA + r. Zahariev) by Fri. at am (up to 2 ex. cr. oints) hem 165 Class 12 A + 3B 2 C + D From the kinetic experimental data, determine the rate law for the following reaction: Exp [A] (M) [B] (M) Initial Rate (M/s) 1 0.080 0.034 1.1 10 4 2 0.080 0.017 1.1 10 4 3 0.16 0.017 2.2 10 4 1. Rate = k [A][B] 3 2. Rate = k [A] 3. Rate = k [A][B] 4. Rate = k [B] 5. Rate = k [A] 2 Clicker Question from Last Class: Compare experiments 1 & 2: Rate does not change when [B] changes (while [A] held constant), so rate is proportional to [B] ( i.e. , reaction is zeroth order in [B]) Compare experiments 2 & 3:...
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#12 - hem 165 Class 12 Chapter 13: Chemical Kinetics (the...

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