Le Chatlier’s Principle
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Transcript of Le Chatlier’s Principle
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Le Chatlier’s PrincipleLe Chatlier’s Principle
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Subliminal message!Subliminal message!
Chemistry is great!Chemistry is great!
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
When an equilibrium is When an equilibrium is disrupted, the reaction will disrupted, the reaction will shift to restore equilibrium. shift to restore equilibrium.
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Subliminal message!Subliminal message!
Chemistry is great!Chemistry is great!
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
The equilibrium can be affected by:The equilibrium can be affected by:
- adding substances – the - adding substances – the reaction will shift away from the reaction will shift away from the change.change.
- removing substances – the - removing substances – the reaction will shift toward the reaction will shift toward the change.change.
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Subliminal message!Subliminal message!
Chemistry is great!Chemistry is great!
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
- temperature – acts like - temperature – acts like a reactant/producta reactant/product
- container size – smaller - container size – smaller container will shift toward container will shift toward small number of moleculessmall number of molecules
- Adding inert gasses – no - Adding inert gasses – no effecteffect
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 H = -453 kJ/molkJ/mol
1) If pressure of A is increased1) If pressure of A is increased
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
1)1) If pressure of A is increasedIf pressure of A is increased
Reaction will shift rightReaction will shift right
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 H = -453 kJ/molkJ/mol
2) 2) The temperature of the The temperature of the reaction is increased reaction is increased
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
2) 2) The temperature of the The temperature of the reaction is increased reaction is increased
Reaction will shift leftReaction will shift left
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Le Chatlier’s PrincipleLe Chatlier’s Principle
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
3) 3) A catalyst is added to the A catalyst is added to the system system
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the reactionFor example: Consider the reaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
3) 3) A catalyst is added to the system A catalyst is added to the system
No change in the equilibriumNo change in the equilibrium
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Le Chatlier’s PrincipleLe Chatlier’s Principle
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
4) 4) More compound B is steadily More compound B is steadily added to the reaction chamberadded to the reaction chamber
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
4)4) More compound B is steadily More compound B is steadily added to the reaction chamberadded to the reaction chamber
The reaction will shift rightThe reaction will shift right
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 H = -453 kJ/molkJ/mol
5) 5) An inhibitor is added An inhibitor is added
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
5)5) An inhibitor is addedAn inhibitor is added
No shift in equilibrium No shift in equilibrium
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
6) 6) Argon gas is added to the Argon gas is added to the reaction chamber reaction chamber
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
6)6) Argon gas is added to the Argon gas is added to the reaction chamber reaction chamber
No shift in equilibriumNo shift in equilibrium
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the For example: Consider the reactionreaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
7) 7) The container is made The container is made smaller smaller
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Subliminal message!Subliminal message!
Wednesdays and fridays at lunch in Wednesdays and fridays at lunch in room 122room 122
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Le Chatlier’s Le Chatlier’s PrinciplePrinciple
For example: Consider the reactionFor example: Consider the reaction
A + B A + B C C H = -453 kJ/molH = -453 kJ/mol
7)7) The container is made smaller The container is made smaller
the reaction will shift rightthe reaction will shift right