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level: Le Chatelier's Principle

Questions and Answers List

level questions: Le Chatelier's Principle

QuestionAnswer
What does Le Chatelier's Principle say?-This is simply saying that a Change in either: Concentration, Pressure or Temperature will have the Equilibrium Position move to Fight that Change -Can ONLY happen in a Reversible Reaction
How can Temperature affect the Position of Equilibrium-The Position of Equilibrium will be Affected by Temperature because either the Forward will be Exothermic or Endothermic, and the Backwards would be Opposite to the Forward -Decreasing the Temperature means the Position of Equilibrium will move in the Exothermic Direction, to Make more Heat -Increasing the Temperature means the Position of Equilibrium will move in the Endothermic Direction, to Absorb more Heat
Example: N₂ + 3H₂ ⇌ 2NH₃ -If the Forward Reaction is Exothermic, then what will happen to the Position of Equilibrium if the Temperature Decreased?-If the Temperature Decreases, then the Position of Equilibrium will move to Counter that Change, by shifting towards the Exothermic Reaction, so more 2NH₃ is Made [Product]
How can Pressure affect the Position of Equilibrium?-Increasing the Pressure will have the Position of Equilibrium move towards the Side with the Least Amount of Moles, this Reduces Pressure -Lowering the Pressure will have the Position of Equilibrium move towards the Side with the Most Amount of Moles. This Increases Pressure
Example N₂ + 3H₂ ⇌ 2NH₃ -What happens if the Pressure Increased?-Since the Pressure Increased, the Position of Equilibrium will move in a way to Counter that Change, so it will move with the Side that has the Least Amount of Moles, and that being 2NH₃ [2 Moles to 4 Moles]
How can the Concentration affect the Position of Equilibrium?-Increasing the Concentration of Reactants will want the Position of Equilibrium to Lower that, so it will go Towards the Products Side, using More of it Up -Increasing the Concentration of Products will want the Position of Equilibrium to Lower that, so it will go Towards the Reactants Side, using More of it Up
Example N₂ + 3H₂ ⇌ 2NH₃ -What happens if the Concentration of the Reactants Increased?-Since the Concentration has been Increased, the Position of Equilibrium will move in a way that Counters that Change -It will use up more Reactants -So therefore the Position of Equilibrium will move Left