The equilibrium constant Kp and controlling the position of equilibrium

What is the mole fraction?

The number of moles of the specific gas / total number of moles in gas mixture

What is partial pressure?

The mole fraction of a specific gas x the total pressure

What does the sum of all the partial pressure equal?

The total pressure

What will the total of the mole fractions always be?

1

What is the equation for Kp?

What does Kp only include?

Gases - only gases have partial pressures

Other species must be ignored

What happens to K at a set temperature?

K is constant and doesn’t change despite any modifications to concentration, pressure of presence of a catalyst

What does cause K to change?

If the temperature is changed

If the forward reaction if exothermic, what happens if the temperature is increases?

Equilibrium constant decreases

Raising the temperature decreases the equilibrium yield of products - equilibrium shifts to the left

numerator of Kp expression increases more

denominator of Kp increases to restore Kp

If the forward reaction is endothermic, what happens if the temperature is increased?

Equilibrium constant increases

Increases equilibrium yield of products

Does Kp change with pressure?

NO

only temperature