Chem_208_Lecture_9_Color

Chem_208_Lecture_9_Color - PS4 due Friday at 2PM By popular...

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PS4 due Friday at 2PM By popular demand…… NO graphing/text capable calculators on 208 exams Prelim 1: Tues Feb 26, 7:30- 9:00PM Ch 7, 14 (PS 1- 4) This week: Finish Ch. 14 Next week: Starting Ch. 15
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Reaction Mechanism Sequence of elementary (single step) reactions. Elementary Reactions may be: Unimolecular: CH 3 Cl* CH 3 + Cl or Bimolecular: H + Cl 2 HCl + Cl * means electronically excited (usually by absorption of light ) Notes : Exponents in rate law are the stoichiometric coefficients. Elementary processes are reversible, may reach eq’m with equal rates of forward and reverse reactions. Reaction intermediates may be formed and consumed in elementary steps. They cannot appear in the overall chemical equation or in the overall rate law expression. The “rate determining step” occurs much more slowly than the others.
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Reaction Mechanism Notes : Exponents in rate law are the stoichiometric coefficients.
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