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This lesson explores Le Chatelier's Principle, which states that a system at equilibrium will shift in the opposite direction when stressed, aiming to re-establish equilibrium. We discuss how changes in temperature, pressure, and concentrations of reactants or products affect the direction of shifts in chemical reactions. The concepts are examined through equations and practical examples, demonstrating how chemists manipulate conditions to favor either reactants or products. Understanding these shifts is crucial for efficient chemical processes in laboratory and industrial settings.
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Le Chatelier's Principle Lesson 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
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
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
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
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
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
1.1 Increasing the temperature shifts in the direction that decreases energy: A + B ⇌ C +Energy stress- increase Temp reaction-shifts left
1.1 Increasing the temperature shifts in the direction that decreases energy: A + B +Energy⇌ C stress- increase Temp reaction-shifts right
1.2 Decreasing the temperature shifts in the direction that increases energy. A + B + Energy⇌ C stress- decrease Temp reaction-shifts left
2.1 Adding areactant or productshifts the reaction in the direction that removes them. A + B ⇌ C + Energy stress- increase [A] reaction-shifts right
2.2 Adding a reactantor productshifts in the direction that removes them. A + B ⇌ C + Energy stress- increase [C] reaction- shifts left
2.3 Removing a reactantor productshifts in the opposite direction. A + B ⇌ C + Energy stress- decrease [A] reaction-shifts left
2.4 Removing a reactantor productshifts in the opposite direction. A + B ⇌ C + Energy stress- decrease [C] reaction- shifts right
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
4.1 Adding a catalyst does not shiftthe equilibrium Forward and reverse rates are increased by the same amount Equilibriumis attained faster reactants products
5.1 Adding aninert(non-reactive) gas does not shiftthe equilibrium. 2NH3(g)⇌ N2(g) + 3H2(g) Adding Ne(g) No shift!
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
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
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
