le chatelier's principle lesson 2
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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Le Chatelier'sPrinciple
Lesson 2
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What Happens in Vegas stays in Vegas
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If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium.
⇌reactants
products
Chemists can shift the reaction to the Products or Reactants
Left
![Page 4: Le Chatelier's Principle Lesson 2](https://reader036.vdocuments.us/reader036/viewer/2022062501/56816341550346895dd3d29a/html5/thumbnails/4.jpg)
If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium.
⇌reactants
products
Chemists can shift the reaction to the Products or Reactants
Left
![Page 5: Le Chatelier's Principle Lesson 2](https://reader036.vdocuments.us/reader036/viewer/2022062501/56816341550346895dd3d29a/html5/thumbnails/5.jpg)
If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium.
⇌reactants
products
Chemists can shift the reaction to the Products or Reactants
Right
![Page 6: Le Chatelier's Principle Lesson 2](https://reader036.vdocuments.us/reader036/viewer/2022062501/56816341550346895dd3d29a/html5/thumbnails/6.jpg)
If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium.
⇌reactants
products
Chemists can shift the reaction to the Products or Reactants
Right
![Page 7: Le Chatelier's Principle Lesson 2](https://reader036.vdocuments.us/reader036/viewer/2022062501/56816341550346895dd3d29a/html5/thumbnails/7.jpg)
If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium.
⇌reactants
products
Chemists can shift the reaction to the Products or Reactants
Right
![Page 8: Le Chatelier's Principle Lesson 2](https://reader036.vdocuments.us/reader036/viewer/2022062501/56816341550346895dd3d29a/html5/thumbnails/8.jpg)
If a system in equilibrium is stressed it shifts in the opposite direction to reach a new equilibrium.
⇌reactants
products
Chemists can shift the reaction to the Products or Reactants
Right
![Page 9: Le Chatelier's Principle Lesson 2](https://reader036.vdocuments.us/reader036/viewer/2022062501/56816341550346895dd3d29a/html5/thumbnails/9.jpg)
1.1 Increasing the temperature shifts in the direction that decreases energy:
A + B ⇌ C + Energy
stress- increase Temp reaction- shifts left
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1.1 Increasing the temperature shifts in the direction that decreases energy:
A + B + Energy ⇌ C
stress- increase Temp reaction- shifts right
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1.2 Decreasing the temperature shifts in the direction that increases energy.
A + B + Energy ⇌ C
stress- decrease Temp reaction- shifts left
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2.1 Adding a reactant or product shifts the reaction in the direction that removes them.
A + B ⇌ C + Energy
reaction- shifts rightstress- increase [A]
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2.2 Adding a reactant or product shifts in the direction that removes them.
A + B ⇌ C + Energy
stress- increase [C] reaction- shifts left
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2.3 Removing a reactant or product shifts in the opposite direction.
A + B ⇌ C + Energy
stress- decrease [A] reaction- shifts left
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2.4 Removing a reactant or product shifts in the opposite direction.
A + B ⇌ C + Energy
stress- decrease [C] reaction- shifts right
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3.1 Only changes to (aq) and (g) reactants or products cause the equilibrium to shift
(s) and (l) have constant concentrations
You can change the concentrations of (aq) and (g)
CaCO3(s) + 2H+(aq) + 2Cl-
(aq) ⇌ Ca2+(aq) + Cl2 (g)
+ CO2(g) + H2O(l)
(s) and (l) do not!
no shift right left left leftright no shift
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reactants
4.1 Adding a catalyst does not shift the equilibrium
Equilibrium is attained faster
Forward and reverse rates are increased by the same amount
products
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5.1 Adding an inert (non-reactive) gas does not shift the equilibrium.
Adding Ne(g)
2NH3(g) ⇌ N2(g) + 3H2(g)
No shift!
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The Forward and Reverse Rates and Shifting Explain in terms of the immediate changes to the forward and reverse rates after each stress why each shift occurs
2CO(g) + O2(g) ⇄ 2CO2(g) + energy
ShiftForwardReverse No change
IncreasesRight
1. Some CO is added- more reactant collisions.
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The Forward and Reverse Rates and Shifting Explain in terms of the immediate changes to the forward and reverse rates after each stress why each shift occurs
2CO(g) + O2(g) ⇄ 2CO2(g) + energy
2. CO is removed. ShiftForwardReverse
leftdecreasessame
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The Forward and Reverse Rates and Shifting Explain in terms of the immediate changes to the forward and reverse rates after each stress why each shift occurs
2CO(g) + O2(g) ⇄ 2CO2(g) + energy
3. Temperature is increased-
ShiftForwardReverse
increases increases by more
left
both forward and reverse rates increase.
We know it shifts left