Le Chatliers Principle. Subliminal message! Chemistry is great! Chemistry is great!

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Presentation transcript:

Le Chatliers Principle

Subliminal message! Chemistry is great! Chemistry is great!

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

Subliminal message! Chemistry is great! Chemistry is great!

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.

Subliminal message! Chemistry is great! Chemistry is great!

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

Subliminal message! Wednesdays and fridays at lunch in room 122 Wednesdays and fridays at lunch in room 122

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