2_Chemical_Equilibrium_part_2

2_Chemical_Equilibrium_part_2 - Chemical...

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Chemical Equilibrium (Chapter 7) CHEM 300
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Frc 6 P     Glc 6 P In class exercise 10 Estimate the fraction f of Frc-6-P in a solution of Frc-6-P and Glc-6-P in equilibrium with each other at 25 if r G o = +1.7 kJ mol -1 . Sketch G versus ∆ξ for the reaction
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What is the effect of changing temperature on the equilibrium constant? assume r H° is independent of temperature ln K = Δ r H o RT + Δ r S o R Δ r G o = Δ r H o T Δ r S o = RT ln K The response of equilibria to changing conditions: van’t Hoff equation
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The van’t Hoff equation ln K 2 K 1 = + Δ r H o R 1 T 1 1 T 2 = + Δ r H o R T 2 T 1 T 1 T 2 (By knowing the equilibrium constant of a reaction at T 1 we can calculate the equilibrium constant of a reaction at T 2 )
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Assume T 2 > T 1 For endothermic reaction Δ r H>0, then K 2 > K 1 For exothermic reaction Δ r H<0, then K 1 > K 2 • Increase of T shifts the equilibrium toward products in an
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This note was uploaded on 11/28/2011 for the course CHEM 300 taught by Professor N.gerber during the Fall '11 term at S.F. State.

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2_Chemical_Equilibrium_part_2 - Chemical...

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