Le Chatelier's Principle Lesson 2

1. Le Chatelier's Principle Lesson 2

2. If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium. Chemists can shift the reaction to the Products or Reactants Left ⇌ reactants products

3. If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium. Chemists can shift the reaction to the Products or Reactants Left reactants ⇌ products

4. If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium. Chemists can shift the reaction to the Products or Reactants Right reactants ⇌ products

5. If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium. Chemists can shift the reaction to the Products or Reactants Right reactants ⇌ products

6. If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium. Chemists can shift the reaction to the Products or Reactants Right ⇌ reactants products

7. If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium. Chemists can shift the reaction to the Products or Reactants Right ⇌ reactants products

8. 1.1 Increasing the temperature shifts in the direction that decreases energy: A + B ⇌ C +Energy stress- increase Temp reaction-shifts left

9. 1.1 Increasing the temperature shifts in the direction that decreases energy: A + B +Energy⇌ C stress- increase Temp reaction-shifts right

10. 1.2 Decreasing the temperature shifts in the direction that increases energy. A + B + Energy⇌ C stress- decrease Temp reaction-shifts left

11. 2.1 Adding areactant or productshifts the reaction in the direction that removes them. A + B ⇌ C + Energy stress- increase [A] reaction-shifts right

12. 2.2 Adding a reactantor productshifts in the direction that removes them. A + B ⇌ C + Energy stress- increase [C] reaction- shifts left

13. 2.3 Removing a reactantor productshifts in the opposite direction. A + B ⇌ C + Energy stress- decrease [A] reaction-shifts left

14. 2.4 Removing a reactantor productshifts in the opposite direction. A + B ⇌ C + Energy stress- decrease [C] reaction- shifts right

15. 3.1 Only changes to (aq)and (g)reactants or products cause the equilibrium to shift (s)and (l)do not! You can change the concentrations of (aq) and (g) (s)and (l)have constantconcentrations CaCO3(s) + 2H+(aq) + 2Cl-(aq)⇌ Ca2+(aq) + Cl2 (g)+ CO2(g) + H2O(l) no shift right no shift right left left left

16. 4.1 Adding a catalyst does not shiftthe equilibrium Forward and reverse rates are increased by the same amount Equilibriumis attained faster reactants products

17. 5.1 Adding aninert(non-reactive) gas does not shiftthe equilibrium. 2NH3(g)⇌ N2(g) + 3H2(g) Adding Ne(g) No shift!

18. The Forward and Reverse Rates and Shifting Explainin terms of the immediate changes to the forward andreverserates after each stress why each shift occurs 2CO(g) + O2(g)⇄ 2CO2(g) + energy Shift Forward Reverse 1. Some CO is added- more reactant collisions. Right Increases No change

19. The Forward and Reverse Rates and Shifting Explain in terms of the immediatechanges to the forwardandreverserates after each stress why each shift occurs 2CO(g) + O2(g)⇄ 2CO2(g) + energy 2. CO is removed. Shift Forward Reverse left decreases same

20. The Forward and Reverse Rates and Shifting Explain in terms of theimmediatechanges to the forwardandreverserates after each stress why each shift occurs 2CO(g) + O2(g)⇄ 2CO2(g) + energy 3.Temperature is increased- Shift Forward Reverse We know it shifts left both forward and reverse rates increase. left increases increases by more