kinetic - Kinetic vs. Thermodynamic Control of Reactions...

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Chem 341 - Kinetic vs Thermodynamic Control, Copyright - D.J. Dyer & SIUC 1 Week 1 Part A, p. 441: Preparation of Cyclohexanone Semicarbazone. Part B, p. 441: Preparation of 2-Furaldehyde Semicarbazone. Part C, p. 441: Reactions in Phosphate Buffer. Part D, p. 442: Reactions in Bicarbonate Buffer. Part E, p. 442: Reversibility of the Reaction. TA’s will assign different parts and your section will share data Kinetic vs. Thermodynamic Control of Reactions Important Concepts • Kinetic control/conditions • Thermodynamic control/conditions • De±nitions: exo/endothermic, enthalpy, entropy, activation energy, free energy Δ G = Δ H - T Δ S • pH buffers
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Chem 341 - Kinetic vs Thermodynamic Control, Copyright - D.J. Dyer & SIUC 2 Energy of Reactions A C B Δ H c Δ Δ H c Δ G Rx Coordinate Energy A B C B A Δ E BA C A Δ E CA Δ E CA >> Δ E BA slow fast - change in free energy (Gibbs free energy) Δ G - change in enthalpy (energy of bonds) Δ H - change in entropy (amount of disorder) Δ S Δ G = Δ H - T Δ S Δ G Δ G - activation energy (energy required to react) Endothermic Δ
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kinetic - Kinetic vs. Thermodynamic Control of Reactions...

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