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Lec-13-Chap15-3-bare - Lec-13-Chap15-3-bare Lec-13 Chemical...

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Lec-13-Chap15-3-bare 10/2/2011 Chemical Equilibrium Concepts. Equilibrium constant. Uses 1 Lec-13: Chemical Equilibrium Chapter 15 1 C+ D+ A+ B+ a b c d For a reaction     D A B C c d a b 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: “multiplying” reaction equations        2 2 1 2 2 2 2 2 H O H O g 1 H g O g 2 + H O c K The numerical value of the two equilibrium constants is very different .    2 1 2 2 2 2 2 2 2 2 2 2 H O H H O O H O c c K K please don’t!!!!!!!!!!!! 2         2 2 2 2 2 2 2 2 H O 2H O g 2H g O g + H O c K For example multiply the chemical equation by 2:
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