Reversible Reactions and Equilibria - Paper 1

Question 1

What conditions are required to achieve dynamic equilibrium?

Answer 1

When a reversible reaction happens in a closed container, it can achieve a dynamic equilibrium.

Question 2

What is happening in a reaction at equilibrium?

Answer 2

• The forward and backward reactions are still happening.
• The rates of the forward and backward reactions are the same.
• The concentrations of the reactants and products remain constant.

Question 3

What happens in the Haber process?

Answer 3

Ammonia is formed in a reversible reaction between nitrogen (extracted from the air) and hydrogen (obtained by reacting natural gas with water) that is kept from reaching a dynamic equilibrium.

Question 4

Recall the conditions for the Haber process.

Answer 4

• Temperature 450 °C
• Pressure 200 atm
• Iron catalyst

Question 5

How does pressure affect the position of equilibrium?

Answer 5

A greater pressure favours the side with fewer moles of gas.