Calculate Ke for the following (equilibrium concentrations given below substances)..?

Question

1, Calculate Ke for the following (equilibrium concentrations given below substances)

a) N2 (g) + O2 (g) + heat ↔ 2 NO (g)

[0.13] [0.27] [0.346]

b) 2 NH3 (g) ↔ N2 (g) + 3 H2 (g) + heat

[0.011] [0.224] [0.263]

c) 2 H2 (g) + S2 (g) + heat ↔ 2 H2S (g)

[0.62] [0.234] [0.0235]

2. For all three of the equilibria in problem #1 predict (1) how Ke is affected by an increase in temperature, (2) predict how the equilibrium will shift when pressure is decreased, (3) predict how the equilibrium will shift when the concentration of the underlined substance is increased, and (4) predict how the equilibrium will shift when the temperature is decreased.

No idea on EARTH how to do this... could someone out there offer a little bit of help?

Thanks!

Answer 1

Ke = [NO]^2 / [N2][O2] = 0.346)^2 / 0.13 x 0.27 = 3.41

1)if T increases the equilibrium will shift on the right

2)if p decreases this does not affect the equilibrium

3) I do not know the underlined substance : if it is a reactant the equilibrium will shift on the right , if it is a product the equilibrium will shift on the left

4) if T  decreases the equilibrium will shift on the left

Ke = (0.224)(0.263)^3 / (0.011)^2 = 33.7

1) on the left

2) on the left

3) ?

4) on the right

Ke = (0.0235)^2 / (0.62)^2(0.234) =0.00613

1)on the right

2) on the left

3) ?

4) on the left