CH 101 notes 10-22

CH 101 notes 10-22 - Rates of Reaction OH + CH3I TS H H O...

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E OH 1- , CH 3 I I 1- , CH 3 OH Reaction Coordinate TS H O I H C H H δ - δ - Section 9.10 Rate of forward reaction: determined by the speed at which the reactants can reach the transition state. OH 1- + CH 3 I CH 3 OH + I 1- Rates of Reaction Rate of reverse reaction: determined by the speed at which the products can reach the transition state. How fast can one reach the transition state for the forward reaction? OH - & CH 3 I need to collide the right way R f = Rate of forward reaction concentration of reactant in mol/L or M rate constant (factor related to E act forward ) Section 9.10 [OH - ] [CH 3 I] concentration dependent x right orientation with enough energy k f x H O I H C H H δ - δ - How fast can one reach the transition state in reverse? CH 3 OH & I - need to the & Products I HO H C H H R r = Rate of reverse reaction Section 9.10 [I - ] [CH 3 OH] concentration of product in mol/L or M x k r rate constant (factor related to E act reverse ) x (s) pure solid concentration = [1] (l) pure liquid concentration = [1] (g) pure gas concentration = pressure of gas = [mol/L] Writing Rate Laws 101 Inclusion rules apply: (aq) aqueous solute concentration = [mol/L] Section 9.11 R f = [reactants] coefficient k f x R r = [products] coefficient k r x Writing Rate Laws 101 Gases, Solids, and Liquids: 2 Na(s) + 2 H 2 O(l) 2 Na 1+ (aq) + 2 OH 1- (aq) + H 2 (g) R f = k f R r = k r [Na 1+ ] 2 [OH 1- ] 2 [H 2 ] R f = k f [reactants] Forward Rate Law: R r = k r [products] Reverse Rate Law: = k f [Na] 2 [H 2 O] 2 (s) pure solid concentration = [1] 1 (l) pure liquid concentration = [1] 1 Section 9.10 E Reaction Coordinate E barrier (forward) Increase forward or reverse rate?
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This note was uploaded on 06/08/2008 for the course CH 101 taught by Professor Bigham during the Fall '08 term at N.C. State.

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CH 101 notes 10-22 - Rates of Reaction OH + CH3I TS H H O...

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