7.4 Le Châtelier's Principle Flashcards
What does Le Chatelier’s Principle state?
That if a dynamic equilibrium is disturbed by a change in conditions (stress), the position of the equilibrium shifts to counteract the change and reestablish equilibrium
When a reactant is added…
- Shifts to the right
- Increases concentration of products
When a reactant is removed…
- Shifts to the left
- Increases concentration of reactants
When a product is added…
- Shifts to the left
- Increases concentration of reactants
When a product is removed…
- Shifts to the right
- Increases concentration of products
In Le Chatelier’s Principle we treat energy as…
- A reactant in an endothermic system
- A product in an exothermic system
When an endothermic system is cooled…
- Shifts to the left
- Favours reactants
When an endothermic system is heated…
- Shifts to the right
- Favours products
When an exothermic system is cooled…
- Shifts to the right
- Favours products
When an exothermic system is heated…
- Shifts to the left
- Favours reactants
How does the system reduce pressure?
By shifting to the side with fewer moles of gas molecules
How do you know if pressure has no effect on the equilibrium?
If there are the same number of molecules on both sides of the equilibrium reaction
1st way to change the pressure of a reaction system
Add or remove a gaseous reactant or product
2nd way to change the pressure of a reaction system
Add an inert gas
What’s an inert gas?
A gas not involved in reaction
