Lec-12-Chap15-2-bare

Lec-12-Chap15-2-bare - Lec-12-Chap15-2-bare 9/28/2011...

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Lec-12-Chap15-2-bare 9/28/2011 Chemical Equilibrium Concepts. Equilibrium constant. Uses 1 Lec-12: Chemical Equilibrium Chapter 15 1 C+ D+ A+ B+ ab cd For a reaction         D AB C c K the equilibrium constant expression is Notice that the concentrations correspond to the equilibrium state , for example [A] e . For simplicity we omit the subscript “e” in the following. Equilibrium Constants: General Case K c allows us to answer questions concerning: At equilibrium , do reactants of products predominate? Given initial concentrations of reactants and products , in which way does the reaction proceed? What are the concentrations of reactant and products at equilibrium?         D C c K 2
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Lec-12-Chap15-2-bare 9/28/2011 Chemical Equilibrium Concepts. Equilibrium constant. Uses 2 Equilibrium Constants: reactions with pure phases or solvent participation           4 3 3 4 2 NH aq OH aq NH aq N H H H O N HO c K              22 3 CaO s CO CaCO s g CO c K  The only concentrations that appear in the equilibrium constant expression are those of gases and of solutes in dilute solutions 3 Equilibrium Constants: “multiplying” reaction equations            1 2 2 2 H O g 1 H g O g 2 + c K
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Lec-12-Chap15-2-bare - Lec-12-Chap15-2-bare 9/28/2011...

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