Cog3 h2g 1200k composit ion of gasmixture notatequil

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Unformatted text preview: reactants at ý í ï ï equilibrium ï ï ï ï ï ï î þ ì amount of ü ï ï ï ï ï ï í products at ý ï ï equilibrium ï ï ï ï ï ï î þ Ø Reactants are favored at equilibrium ¾¾ ® O2 (g) ¬¾ 2 NO (g) ¾ N2 (g) + Equilibrium Conc’s: 1.0 M K c = 1.0 M 6.8x10-16 M 2 [NO]2 (6.8x10­16 M) = = 4.6x ­31 10 [N 2 ][O 2 ] (1.0 M)(1.0 M) Kc » 1 (0.5 – 10) ì amount of ü ï ï ï ï ï ï í products at ý ï ï equilibrium ï ï ï ï ï ï î þ Ø @ ì amount of ü ï ï ï ï ï ï íreactants at ý ï ï equilibrium ï ï ï ï ï ï î þ Neither reactants, nor products are predominant CO (g) + 3 H2 (g) Equilibrium Conc’s: 0.0613 M 0.184 M K c = ¾¾ ® ¬¾ ¾ CH4 (g) + H2O (g) 0.0387 M 0.0387 M [CH 4 ][H 2 O] (0.0387 M)(0.0387 M) = = 3 . 9 3 3 [CO][H 2 ]3 (0.0613 M)(0.184 M) 13 Chemistry 102 Chapter 14 Example 1: 1 0 The Equilibrium Constant for the reaction below equals 4.0 x 10 3 at 25 C. ¾¾ ® ¬¾ 2 NO2 (g) ¾ (a) Does the equilibrium mixture contain predominant ly reactants or products? 2 NO (g) + O2 (g) (b) If [NO] = [O2] = 2.0 x 10-6 M at equilibrium, what is the equilibrium concentration of [NO2]? K c = [NO 2 ]2 [NO 2 ]2 = K c [NO]2 [O 2 ] 2 [NO] [O 2 ] [NO 2 ]2 = K c [NO]2 [O 2 ] = (4.0x1013 )(2.0x10­6 ) 2 (2.0 ­+ ) = 1.8x ­2 M x10 10 2 NO (g) Equilibrium Conc’s: +...
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