1.6.3 & 1.6.4: Kc and factors affecting it

Question 1

The equilibrium constant

Answer 1

Kc

A ratio using the concentrations of products and reactants after equilibrium is reached

Question 2

Kc depends on

Answer 2

specific temperature

Question 3

Kc units

Answer 3

(cancel out)

moldm3

Question 4

Factors affecting the equilibrium constant

3

Answer 4

temperature change
concentration change
adding a catalyst

Question 5

Temperature change effect on Kc

Answer 5

equilibrium shifts to endothermic direction
to absorb heat
eg: if increase in heat = forward reaction = endothermic = more products formed = Kc will rise
vice versa

Question 6

Concentration change effect on Kc

Answer 6

Kc value fixed a given temp.
so if conc. changes, the others concs. will change too keep the Kc value the same
AKA: change in conc. = Kc stays same

Question 7

Addition of a catalyst effect on Kc

Answer 7

no effect on position of eqm. or Kc
as will increase rate of both reactions
so eqm. will be reached faster