3B Le Chateliers Principle Flashcards
Le Chatelier’s Principle
If an external stress if applied to a system at equilibrium, the system adjusts in such a way that the stress is partially offset as the system reaches a new equilibrium position
N2+3H2 <–> 2NH3:
If NH3 is added, which way will the equilibrium shift
The equilibrium shifts left to offset stress
Which way will equilibrium shift:
Increase concentration of products
Left
Which way will equilibrium shift:
Decrease concentration of products
Right
Which way will equilibrium shift:
Increase concentration of reactants
Right
Decrease concentraiton of reactants
Left
How does this shift equlibrium:
Increase all partial pressures
Shifts towards side with the fewest moles of gas
How does this shift equlibrium:
Decrease all partial pressures
Shifts towards side with most moles of gas
How does this shift equilbrium:
Increase volume of reactor
Shifts to Side with the most moles of gas
How does this shift equlibrium:
Decrease volume of reactor
Shifts towards side with fewest moles of gas
Treat the heat of a reaction as a ______
Compound
Is this endothermic or exothermic: A -> B + heat
1. If you increase temperature heat, what happens to K
2. If you decrease temperature/heat, what happens to K
Exothermic
1. K decreases
2. K increases
Is this endothermic or exothermic: A + heat -> B
1. If you increase temperature heat, what happens to K
2. If you decrease temperature/heat, what happens to K
Endothermic
1. K increases
2. K decreases
If heat is consumed, where is heat (products or reactants)
Reactant
If heat is Released, where is heat (products or reactants)
Products
Does a catalyst change K
No
Does a catalyst shift the position of an equilibrium system
No, it just reaches equilibrium sooner
Does concentration shift equilibrium and change Kc
Shifts equilibrium, does NOT change Kc
Does pressure shift equilibrium and change Kc
Shifts equilibrium does NOT change Kc
Does volume shift equilibirum and change Kc
Volume shift equilibrium and does NOT change Kc
Does temperature shift equilbirum and change Kc
Shifts equilibrium and DOES change Kc
Does a catalyst shift equilibrium and change Kc
NO it does not shift equilibrium OR Kc
