Chem_208_Lecture_9_BW

Chem_208_Lecture_9_BW - 1 PS4 due Friday at 2PM By popular...

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Unformatted text preview: 1 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 2 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. 3 Reaction Mechanism Notes : ⇒ Exponents in rate law are the stoichiometric coefficients....
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Chem_208_Lecture_9_BW - 1 PS4 due Friday at 2PM By popular...

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