TOPIC 11: EQUILIBRIUM II

Question 1

When is Kp used?

Answer 1

Kc is used to calculate equilibria for gases

Question 2

What is the equation for mole fraction

Answer 2

number of moles/total number of moles

Question 3

Define Total pressure

Answer 3

The total pressure of a gas mixture is the sum of all partial pressures of the individual gas

Question 4

Difference between Kc and Kp

Answer 4

1. Kp measures the equlibria using partial pressure whereas Kc uses molar concentration.
2. Kc concentrations are surrounded by square brackets whereas in Kp they are round brackets.

Question 5

What do you have to do when working out equilibrium constant for Heterogeneous equilibria

Answer 5

cross out p(compound) for any state of matter that is not gas