u2: le chatelier Flashcards
1
Q
chemical systems in equilibrium…
A
- are closed systems
- display constant macroscopic properties
- established from either direction
- have reactants AND products
2
Q
le chatelier’s principle
A
when stress applied to system in equilibrium, rxn shifts in direction that relieves the stress and new equilibrium is established
3
Q
possible stresses
A
- ∆ concentration
- ∆ P: pressure
- ∆T: temperature
4
Q
increase in [reactant]
A
- shift equilibrium to right
- more products formed
5
Q
decrease in [reactant]
A
- shift equilibrium to left
- more reactants formed
6
Q
increase in [product]
A
- shift equilibrium to left
- more reactants formed
7
Q
decrease in [product]
A
- equilibrium shift to right
- more product formed
8
Q
change in temperature of exothermic rxns
A
- add heat: shift left, increase reactants
- remove heat: shift right, increase product
9
Q
change in temperature of endothermic rxns
A
- add heat: shift right, increase product
- remove heat: shift left, increase reactants
10
Q
condition of equilibrium shift due to change in pressure
A
applies to only gases
11
Q
change in pressure
A
- increase: shift to side w/ less gas
- decrease: shift to side w/ more gas
12
Q
factors that don’t impact equilibrium
A
- inert gases: noble gases don’t interact w/ system
- catalysts: speeds up rxn both directions equally, nd concentrations r same
13
Q
noble gases
A
last vertical group on periodic table
