the Haber and contact processes*

In the contact process for sulfuric acid production, sulfur dioxide is oxidized to sulfur trioxide according to the equilibrium $$\ce{2SO2(g) + O2(g) <=> 2SO3(g)}$$. What effect does increasing the pressure have on the equilibrium yield of sulfur trioxide?

In the Haber process, nitrogen and hydrogen react to form ammonia. The equilibrium is represented as: $$\text{N}_{2}(g) + 3\text{H}_{2}(g) \rightleftharpoons 2\text{NH}_{3}(g) \quad \Delta H = -92 \text{ kJ/mol}$$ Which of the following changes would shift the equilibrium position to the right and favour the formation of ammonia?

The Haber process produces ammonia at high temperature and pressure in the presence of a catalyst. (a) State the forward reaction equation for the Haber process. (1 mark) (b) Explain why increasing the pressure shifts the equilibrium position to favour ammonia formation. (1 mark)