C19. The Equilibrium Constant (A2)

Question 1

What is partial pressure?

Answer 1

The contribution to the total pressure a gas possesses and the pressure that a gas would exert if it occupied a container alone

Question 2

What’s the equation for partial pressure of a gas?

Answer 2

Mole fraction of gas x Total pressure

Question 3

How do you calculate mole fraction?

Answer 3

(Number of moles of gas in mixture) / (Total number of moles of gas mixture)

Question 4

What change will induce a change in the constant Kc value?

Answer 4

Change in temperature of reaction

Question 5

What are the effects of temperature and pressure on Kp equilibrium position?

Answer 5

Increase temperature, equilibrium moves in endothermic direction; Increase in pressure, equilibrium moves to side with less molecules

Question 6

How will a catalyst affect the values of Kp?

Answer 6

No effect; Catalyst speeds up forward and backward reactions equally; Only causes reaction to reach equilibrium faster