Chapt15_1 - Gas Phase Equilibrium Chemical Equilibrium...

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Mary J. Bojan Chem 110 Gas Phase Equilibrium Chemical Equilibrium Equilibrium Constant K eq Equilibrium constant expression Relationship between K p and K c Heterogeneous Equilibria Calculations of K c Solving Equilibrium Problems USING AN EQUILIBRIUM CONSTANT Information obtained from K c 1. Which are favored? Reactants or products? 2. Predict direction of a reaction Q reaction quotient 3. Obtaining equilibrium concentrations of reactants and products.
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Mary J. Bojan Chem 110 Chemical Equilibrium Equilibrium is achieved when opposing processes proceed at equal rates. equilibria previously discussed Phase equilibria Eg. liquid vapor coexistance H 2 O(g) H 2 O( l ) In chemical equilibria, forward and reverse reactions occur at equal rates. A B Concentrations of reactants and products do not change over time. Dynamic balance Reaching equilibrium may be slow!
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Chem 110 Haber process: N 2 (g) + 3H 2 (g) 2NH 3 (g) Initial State : reactants only Initial state : products only Same equilibrium achieved Time → Time → Final State: ratio of products to reactants is the same for both! The relationship between the concentrations of products and reactants at “equilibrium” will be the same regardless of starting conditions. Catalysts
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Chapt15_1 - Gas Phase Equilibrium Chemical Equilibrium...

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