equillibrium constants kp

Question 1

What does the p stand for Kp

Answer 1

Pressure

Question 2

What is the kp calculated from

Answer 2

Partial pressure

Question 3

What are the features of the equilibrium constant

When the kp is greater than 1
When the kp is less than 1
If kp is exactly 1

Answer 3

When the kp is greater than 1 - it means the equilibrium is towards the right hand side (more products than reactants)

When the kp is less than 1 - it means the equilibrium is towards the left hand side (more reactants than products)

If kp is exactly 1 - it means that the equilibrium is in the middle (equal amounts of products and reactants)

Question 4

When writing the kp equation what must you consider in the reactants and products brackets

Answer 4

(pp)

Question 5

How do you work out the units for Kp

Answer 5

Can either be KPa or Pa
Add the top powers
At the bottom powers
Take them away from one another

Question 6

What is kp used for

Answer 6

For a reversible reaction in the gas phase

Question 7

How do you answer an equilibria question for

The position of equilibria
The equilibrium yield of a reagent
They value of Kp

If one of the following conditions are changed
The temperature
The pressure or volume of a container
The concentration of a reagent

Answer 7

1. State the answer
2. Make a statement considering the condition which has been changed
3. State the position of equilibrium shifts to the right or left … to oppose the change in condition

Question 8

N2(g) + 3H2 (g) 🔁 2NH3 (g) ΔH = -92 kjmol-1

How would an increase in pressure affect the position of equilibrium

Answer 8

The equilibrium will shift to the RIGHT
There are fewer gaseous moles on the right hand side
The equilibrium will shift to oppose the increase in pressure

Question 9

N2(g) + 3H2 (g) 🔁 2NH3 (g) ΔH = -92 kjmol-1

How would an increase in temperature affect the equilibrium yield of ammonia

Answer 9

The equilibrium yield of ammonia will decrease
The forward reaction is exothermic
The equilibrium will shift to oppose the increase in temperature

Question 10

N2(g) + 3H2 (g) 🔁 2NH3 (g) ΔH = -92 kjmol-1

How would a decrease in temperature affect the value of Kp

Answer 10

The value of Kp will increase
The forward reaction is exothermic
The equilibrium will shift to oppose the decrease in temperatures