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chem lecture ch14

dynamic equilibrium Even after a dynamic equilibrium has been reached. Closed systems reach the same equilibrium concentrations whether the reaction is started with reactants or products, whether equilibrium is approached from the forward or reverse direction.
mass action expression; reaction quotient Q Q= [HI]^2/ [H2] [I2]
Equilibrium law can be seen as a condition to be met for a system to be in equilibrium at a certain temp. The value of the equilibrium constant changes with the temp. Both mass action expression and equilibrium law can be predicted from the balanced chemical equation.
Le Chatelier’s principle Adding catalyst affects speed with which a chemical reaction reaches an equilibrium. Adding reactant or product changes Q, it is no longer equal to K. Increasing temp produces an endothermic change. Decreasing temp produces an exothermic change.
Created by: jsherm82