Lecture 16

Lecture 16 - Chem 338 Chemical Equilibrium Keq(T 1 Extent...

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Chem 338 C h em 3 3 8 L e c t u r e 1 6 Chemical Equilibrium: K eq ( T ) 1. Extent of Reaction: ξ 2. Δ r G 0 (T) = -RT ln K eq (T) 3. K eq from JANAF 4. Δ G 0 5. Gibbs - Helmholtz Equation: 6. R ln K eq (T) = [– Δ r H 0 ( T )][1/ T ] + Δ r S 0 ( T ) [] () cd eq ab aA bB cC dD CD KT AB + →+ = , r TP G G ξ ⎛⎞ = Δ ⎜⎟ ⎝⎠ 00 2 P GT H T T ∂Δ Δ =−
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Chem 338 1. Extent of Reaction: ξ Δ G 0 , r TP G G ξ ⎛⎞ ⎜⎟ ⎝⎠ 01 | | ( ) CD A aA bB cC dD dG d c d a b B ξμ μ =+ + =
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Chem 338 01 , | | () r T CD A P aA bB cC dD dc d a b B d G G G ξ ξμ μ μμ ⎛⎞ =+ + = +− =
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Chem 338 2. Δ r G 0 (T) = -RT ln K eq (T) [] 0 0 0 () l n rC D A B a AA cd rr ab re q aA bB cC dD GT c T d T a T b T aTaTR TA CD G T RT AB R T K T μμμ μ μμ +→+ Δ= + =+ Δ + ln ln
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Chem 338
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Chem 338
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Chem 338
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Chem 338 3. K eq from JANAF
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Chem 338
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Chem 338 4. Δ G 0 always. If Δ r G 0 > 0, then ξ eq < ½: reactants are favored.
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Chem 338 5. Gibbs - Helmholtz Equation: 2 P GT H T T ⎛⎞ =− ⎜⎟ ⎝⎠ () 2 2 2 00 1 1 1 P P rr eq P P P P P P rorp GH T S S TT
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This note was uploaded on 06/28/2010 for the course CHEM 338 taught by Professor Petersson during the Spring '10 term at Wesleyan.

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Lecture 16 - Chem 338 Chemical Equilibrium Keq(T 1 Extent...

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