3.1.10: Equilibrium constant

Question 1

What is gas equilibria?

Answer 1

• in equilibrium where all substances are gases, use Kp

Question 2

What is total pressure?

Answer 2

• sum of all partial pressures of individual gases in a gas mixture
• partial pressure found with each individual gas exerting own pressure

Question 3

What’s the equation for mole fraction?

Answer 3

(no. of moles in a gas)
/
(total no. of moles of gas in a mixture)

Question 4

What is the equation for partial pressure?

Answer 4

mole fracion of gas x total pressure

Question 5

What is Kp?

Answer 5

• the equilibrium constant for a reversible reaction where all reactants and products are gases (ICE table at equilibrium)
• to calculate use Kc equation, replacing concentration [] with pp

Question 6

What factors affect Kp?

Answer 6

• Kp only affected by temperature
• changes amount of product formed at equilibrium, changes mole fraction of gas presentn and pp