#13 - hem 165 Class 13 Note Exam 2 is Wednesday(2/25 from...

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Unformatted text preview: hem 165 Class 13 Note: Exam 2 is Wednesday (2/25) from 6:30-7:30 pm (same rooms/seats) Study Guide and Clicker Review Questions: Available on WebCT 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 : The LZ 129 Hindenburg airship, held aloft by 200,000 m 3 of hydrogen gas (!), ignited on 5/6/1937. Despite large exothermicity, the H 2 + O 2 reaction does not occur at an appreciable rate in the absence of an ignition source. Once ignition occurs, however, reaction occurs rapidly via a multistep reaction mechanism. These facts were known to engineers involved in the preparation of Hindenburg as a H 2- bearing airship; however, their efforts to remove all possibilities of ignition ultimately failed. Oh, the humanity! Chapter 13: Chemical Kinetics: The how of chemical reactions-How: fast is the reaction? (rates/rate laws)-How: reactants evolve into products (mechanism) Objectives today: 1. Develop tools to compare proposed reaction mechanisms with measured rate laws. Text: Chapter 13: Section 5; Next class: Chapter 13: Section 6 hem 165 Class 13 Clicker Question From Last Class: The information provided in the table shows the rate constant of the reaction at two temperatures. Use the provided data to find the activation energy of this reaction. Remember that R = 8.314 J/mol K-5.757 1.91 10-3 3.16 10-3 524.4-10.589 2.16 10-3 2.52 10-5 462.9 ln k 1/ T (K-1 ) k (s-1 ) T (K) CH 3 NC( g ) CH...
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This note was uploaded on 10/21/2010 for the course CHEM 155 taught by Professor Burnett,joe during the Fall '08 term at Iowa State.

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#13 - hem 165 Class 13 Note Exam 2 is Wednesday(2/25 from...

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