kinetics_lecture1_F10

kinetics_lecture1_F10 - Kinetics of a Homogeneous Reaction...

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Kinetics of a Homogeneous Reaction Objectives : Study how reactant concentration affects the rate of reaction between 2,4-dinitrochlorobenzene (DNCB) and piperidine Determine how temp affects reaction rate + 2 N H Cl NO 2 NO 2 NO 2 NO 2 N + N H 2 Cl DNCB Pip DNPP Pip:HCl 2,4-dinitrophenylpiperidine
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Uses of Kinetic Results Information about rate of chemical reaction dependence of the rate on concentrations of relevant species dependence of the rate on temperature Prediction of reaction rate under given Adjust reaction rates to obtain specific result Aids in elucidating mechanism of a reaction
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Basic Reaction Kinetics aA + bB cC + dD Reaction rate is measured by following the disappearance of reactant(s) or appearance of product(s) Rate depends on which species is measured If c ≠ d, d[C]/ dt ≠ d[D]/ dt
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Example: 2 Br → Br 2 For every molecule of Br 2 formed, 2 atoms of Br lost : or General case: aA + bB
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kinetics_lecture1_F10 - Kinetics of a Homogeneous Reaction...

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