Le Chatliers Principle

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Le Chatliers Principle When an equilibrium is disrupted, the reaction will shift to restore equilibrium.

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Le Chatliers Principle The equilibrium can be affected by: - adding substances – the reaction will shift away from the change. - removing substances – the reaction will shift toward the change.

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Le Chatliers Principle - temperature – acts like a reactant/product - container size – smaller container will shift toward small number of molecules - Adding inert gasses – no effect

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 1) If pressure of A is increased

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 1) If pressure of A is increased Reaction will shift right

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 2) The temperature of the reaction is increased

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 2) The temperature of the reaction is increased Reaction will shift left

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 3) A catalyst is added to the system

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 3) A catalyst is added to the system No change in the equilibrium

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 4) More compound B is steadily added to the reaction chamber

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 4) More compound B is steadily added to the reaction chamber The reaction will shift right

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 5) An inhibitor is added

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 5) An inhibitor is added No shift in equilibrium

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 6) Argon gas is added to the reaction chamber

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 6) Argon gas is added to the reaction chamber No shift in equilibrium

Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 7) The container is made smaller

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Le Chatliers Principle For example: Consider the reaction A + B C H = -453 kJ/mol 7) The container is made smaller the reaction will shift right