Equilibrium

Question 1

What does Kc stands for?

Answer 1

Equilibrium constant

Question 2

What is homogeneous equilibria?

Answer 2

All equilibria species are in the same state or phase.

Question 3

What is heterogeneous equilibria?

Answer 3

Equilibria species are in different state or phase.

Question 4

What if two solutions are in different phase?

Answer 4

They do not mix together.
eg. polar and non-polar solutions

Question 5

Kc = [NO2]^2 / [N2O4]
Explain in terms of Kc, how the equilibrium shifts if [N2O4] is increased.

Answer 5

If [N2O4] is increased, the terms on the bottom of the expression increase. Ks must remain constant. Therefore the [NO2] must increase and [N2O4] must decrease. The equilibrium therefore shifts in the direction of NO2 (to the left).

Question 6

N2O4 ⇌ 2NO2
Explain in terms of Kp, how the equilibrium shifts if the total pressure is increased.

Answer 6

If the total pressure is increased, all partial pressures increase, however, as there are more terms on the top of the expression, the top of the expression increases more. Kp must remain constant p(N2O4) must increase and p(NO2) must decrease. Therefore the equilibrium shifts in the direction os N2O4 (to the left).