3.1.6 chemical equilibria, Le Chateliers principle and Kc Flashcards
1
Q
what is le chateliers principle?
A
if any factor is changed equilibrium will move so as to oppose this change
2
Q
what is dynamic equilibrium?
A
- reaction occurs in a close system
- rate of forward reaction is equal to rate of reverse reaction
- concentration of reactant and products remain constant
3
Q
what factors can affect the position of equilibrium?
A
- temperature
- pressure
- addition/removal of reactant/ product
4
Q
what effect would increasing temperature have on equilibrium?
A
- equilibria opposes the increase in temperature
- position of equilibrium shifts in the endothermic direction
5
Q
what effect would decreasing temperature have on equilibrium?
A
- equilibria opposes the decrease in temperature
- position of equilibria shifts in exothermic direction
6
Q
what effect does adding product have on equilibrium?
A
- equilibria opposes the increased concentration of product
- position of equilibria shifts left
7
Q
what effect does decreasing the product have on equilibria?
A
- equilibria opposes the decreased concentration of product
- position of equilibria shifts right
8
Q
what is the effect does a catalyst have on equilibria?
A
- no effect on position of equilibria
- catalysts increase the rate of both the forward and reverse reaction by the same
9
Q
what effect does increasing pressure have on equilibria?
A
- equilibria opposes the increased pressure
- equilibria shifts to the side with fewer moles of gas
10
Q
what effect does decreasing pressure have on equilibria?
A
- equilibria opposes the decreased pressure
- equilibria shifts to the side with more moles of gas
11
Q
what is an equation for kc?
A
[products]/ [reactants]
12
Q
what is an equation for kc?
A
[products]/ [reactants]
