Kp & Kc

Question 1

What is Kp?

Answer 1

The equilibrium constant for reversible reactions of gaseous reactants & products

Question 2

Give an example reaction of Kp

Answer 2

Haber Process:
Fe
N2 (g) + 3H2 (g) = 2NH3 (g)

Question 3

How do you write an expression for Kp?

Answer 3

(products)/(reactants)
^2/^3 if they have multiple molecules (big number)

Question 4

How do you calculate partial pressure?

Answer 4

Partial pressure (should + up to total pressure) = mole fraction X Total pressure

Question 5

How do you calculate mole fractions?

Answer 5

Mole fraction = moles at equilibrium of species/total moles at equilibrium

Question 6

What should the mole fractions in the Kp expression + up to?

Answer 6

1 - they are fractions

Question 7

How do you find the units of Kp?

Answer 7

Cancel out the units in the Kp expression

Question 8

How do you find the moles of the compounds at equilibrium?

Answer 8

ICE table
E.G:
Initial moles
Change in moles
Equilibrium moles