Lec-07-Chap14-3-bare

Lec-07-Chap14-3-bare - Lec-07-Chap14-3-bare 9/16/2011...

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Lec-07-Chap14-3-bare 9/16/2011 Reaction Mechanisms. Catalysis 1 Lec-07: Reaction Mechanisms; Catalysis Chapter 13 1 CHE 132 First Midterm - Review Session: Monday September 19, 6:40 - 9:40 PM Harriman Hall 137 Be sure to bring the following: • Stony Brook ID card • 2 or more #2 pencils and a good eraser • Nonprogrammable scientific calculator with spare batteries DO NOT BRING any of the following: • Cell phone, beeper, iPod, or other electronic device • Textbook, notes, or any aids to taking the exam Violations may result in a course grade of F and a report to the Academic Judiciary . No one will be permitted to leave the exam before 9:15 PM. Exam 1, Wednesday September 21 st , 8:30 – 10:00 PM Solar ID Room 000000000 – 107757371 Javits 100 Main Floor 107757372 – 999999999 Javits 100 Balcony Room Assignments
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Lec-07-Chap14-3-bare 9/16/2011 Reaction Mechanisms. Catalysis 2 Reaction Mechanisms and Rate Laws A valid reaction mechanism should: Consist of a series of unimolecular and bimolecular elementary reactions. Consist of reaction steps that sum to the overall reaction equation. Correctly predict the experimental rate law. 3 Unimolecular Processes The transformation requires rotation around the C=C double bond. 4 cis -2-butene trans -2-butene
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Lec-07-Chap14-3-bare 9/16/2011 Reaction Mechanisms. Catalysis 3 Unimolecular Processes The transformation requires rotation around the C=C double bond. 5 Elementary Processes: Unimolecular The elementary unimolecular process obeys a first-order rate law       f irst order with respect to the reactan first order rate consta t nt ci cis-2-buten s-2-bute cis-2-butene ne e t t t k d dt d dt 6
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Lec-07-Chap14-3-bare 9/16/2011 Reaction Mechanisms. Catalysis 4 Elementary Processes: Bimolecular The elementary bimolecular process         33 I aq CH Br aq ICH aq Br aq  7 Elementary Processes: Bimolecular The elementary bimolecular process         I aq CH Br aq aq obeys the second order rate law       3 second order rate c first order with respect to each reacta ons nt nt 3 3 ta I CH B CI CH Br r H t t t t d dt k d dt   8
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Lec-07-Chap14-3-bare 9/16/2011 Reaction Mechanisms. Catalysis 5 Reaction Mechanisms and Rate Laws Most chemical reactions do not occur in a single step; instead they involve a sequence of unimolecular or bimolecular elementary reaction steps .
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Lec-07-Chap14-3-bare - Lec-07-Chap14-3-bare 9/16/2011...

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