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Published byMatthew Camron Small Modified over 9 years ago
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Applications of Equilibrium Constants
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Example For the reaction below 2A + 3B 2C A 1.5L container is initially charged with 2.3 mole of A and 3.0 mole of B. At equilibrium,.75 mole of A is present. Calculate the value of the equilibrium constant.
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Example For the reaction PCl 5 PCl 3 + Cl 2 the equilibrium constant K p is.497. A cylinder is charged with PCl 5 at an initial pressure of 2.20 atm. What are the equilibrium pressures of all of the substances?
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Predicting Reaction Direction If a mixture of reactants and products is not at equilibrium, we can use the equilibrium constant to predict whether the reaction will proceed to the right or left
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Reaction Quotient (Q) When current concentrations of products and reactants are substituted into the equilibrium constant expression Q > K proceeds left (to reactant) Q = K in equilibrium Q < K proceeds right (to product)
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Example For the Haber process below, we have found the K c to be.105. If we place 2.00M H 2, 1.00M N 2, and 2.00M NH 3 in the same container, will the reaction proceed to the right or left? N 2 + 3H 2 2NH 3
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Example At 448°C the equilibrium constant for the reaction H 2 + I 2 2HI is 50.5. Predict the direction in which the reaction will proceed to reach equilibrium if we start with.020 mol of HI,.010 mol of H 2, and.030 mol of I 2 in a 2.0 L container.
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