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Le Chatelier's Principle

Posted: Fri Jan 10, 2020 1:42 pm
by Haley Dveirin 1E
I'm a little confused on Le Chatelier's Principle, can someone define exactly what it is and explain why the in class example Lavelle gave with it?

N2+3H2=2NH3

He said that if N2 were increased, NH3 was increased, and H2 was decreased, the only way to increase the yield of NH3 without adding more reactant would be to remove product.

Re: Le Chatelier's Principle

Posted: Fri Jan 10, 2020 2:20 pm
by Sarah Zhari 1D
Le Chatelier's principle is when a change is applied to a reaction at equilibrium, the equilibrium adjusts to minimize the effect of the change. When N2 is added, there are more reactants than products, or Q<K. Because of this, the equilibrium will shift towards the right to make more products (in this case NH3) so that the system can reach equilibrium and Q=K.

Re: Le Chatelier's Principle

Posted: Fri Jan 10, 2020 2:26 pm
by John Liang 2I
Haley Dveirin 1E wrote:I'm a little confused on Le Chatelier's Principle, can someone define exactly what it is and explain why the in class example Lavelle gave with it?

N2+3H2=2NH3

He said that if N2 were increased, NH3 was increased, and H2 was decreased, the only way to increase the yield of NH3 without adding more reactant would be to remove product.


Le Chatlier's Principle discussed in class is simply that a chemical rxn at equilibrium will do its best to minimize the effects of changes to the rxn to return to equilibrium. in other words, if something changes in the rxn at equilibrium (add/remove N2 or NH3 or H2) then the rxn will shift left or right to reestablish equilibrium. When NH3 is removed, the rxn now must produce more NH3 to return to equilibrium. This is an important chem rxn that produces fertilizer.

Re: Le Chatelier's Principle

Posted: Fri Jan 10, 2020 2:49 pm
by aishwarya_atmakuri
Le Chatlier's Principle states that if a system is disturbed, it will counteract the disturbance.

Re: Le Chatelier's Principle

Posted: Fri Jan 10, 2020 2:55 pm
by rachelle1K
Yes, it basically shows that a chemical reaction can adjust in order to minimize the effect and go back to equilibrium.

Re: Le Chatelier's Principle

Posted: Fri Jan 10, 2020 5:24 pm
by Ying Yan 1F
As the previous posts stated, Le Chatelier's principle just means that a reaction will adjust in order to go back to equilibrium.

Re: Le Chatelier's Principle

Posted: Fri Jan 10, 2020 9:52 pm
by Louise Lin 2B
An example of Le Chatelier's would be to decrease the volume, and if there are more moles of gas on the left, then the reaction would shift to the right to accommodate for the change and vice versa.

Re: Le Chatelier's Principle

Posted: Fri Jan 10, 2020 11:50 pm
by faithkim1L
Le Chatelier's Principle basically just says that a chemical equation will move to decrease the amount of change as much as possible. So if there is a chemical equation and product has been added, the equation will move "away" from the products and towards the reactants (reverse reaction).