Worksheet 19

Worksheet 19 - Worksheet 19 Le Chatelier's Principle Le...

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Worksheet 19 - Le Chatelier's Principle Le Chatelier's Principle states that if a stress is applied to a system at equilibrium, the system will adjust, to partially offset the stress and will reach a new state of equilibrium. The "stresses" that can be applied to the system include changes in concentration , pressure , volume and temperature . - Changes in concentration of either reactants or products will change the value of Q , the reaction quotient. Adding more reactant will drive the forward reaction. Adding more product will drive the reverse reaction. Removal of reactants or products will shift the equilibrium in the direction needed to produce more of the substance that was removed. Solids and pure liquids can not change concentration. Changing the amount of these present in the system will have no effect on equilibrium, unless they are removed entirely. Catalysts are species that speed up the rate of a reaction. However, they speed up both the forward and reverse reactions, leaving K unchanged. - Changes in pressure and volume will affect the equilibrium of reactions involving gases. In the previous worksheet, you calculated the effect of pressure on gaseous systems. Increasing
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This note was uploaded on 12/05/2011 for the course CHEM 231 taught by Professor Beck during the Spring '11 term at Indiana.

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Worksheet 19 - Worksheet 19 Le Chatelier's Principle Le...

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