4.4 Chapter 15 Chemical Equilibrium (inked 2)

4.4 Chapter 15 Chemical Equilibrium (inked 2) - Gases: The...

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Unformatted text preview: Gases: The Equilibrium Constant, K P Mixtures of gases are solutions just as liquids are. Define K P , based on partial pressure (or activities) of gasses, rather than concentration K P = (a SO ) 2 (a O ) (a SO ) 2 3 2 2 = P P SO 3 a SO 3 = P P SO 2 a SO 2 = P P O 2 a SO 3 K P = ( P SO ) 2 ( P O ) ( P SO ) 2 3 2 2 P 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) Gases: The Equilibrium Constant, K C 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) K P = (a SO ) 2 (a O ) (a SO ) 2 3 2 2 = ( P SO ) 2 ( P O ) ( P SO ) 2 3 2 2 P = ([SO 2 ] RT ) 2 ([O 2 ] RT ) ([SO 3 ] RT ) 2 P = [SO 2 ] 2 [O 2 ] [SO 3 ] 2 P RT = RT K C Where P = 1 bar ;P X = n x RT = [X] RT V _ 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) K c = [SO 2 ] 2 [O 2 ] [SO 3 ] 2 RT P SO 3 2 RT P SO 2 RT P O 2 = 2 = RT P SO 3 2 P SO 2 P O 2 2 K c = K P ( RT ) K P = K c ( RT )-1 K P = K c ( RT ) n In general: Gases: The Equilibrium Constant, K C C(s) + H 2 O(g) CO(g) + H 2 (g) Heterogeneous Reactions: Pure Liquids and Solids Equilibrium constant expressions do not contain concentration terms for solid or liquid phases of a single component (that is, pure solids or liquids).(that is, pure solids or liquids)....
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4.4 Chapter 15 Chemical Equilibrium (inked 2) - Gases: The...

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