The production of ammonia
Question 193.5 The production of ammoniaNitrogen and hydrogen are reacted together in the Haber process to make ammonia. The equation for the reaction is:(a) What is the source of the nitrogen? (1 mark)(b) Explain why increasing the pressure increases the chance of reaction between the nitrogen and hydrogen molecules. (1 mark)The graph shows how the percentage yield of ammonia depends on the temperature and pressure inside the reaction vessel.(c) Use your knowledge of the Haber process and the information on the graph to describe the conditions used to increase the rate of reaction. (4 marks)(d) What is the percentage yield of ammonia produced at a temperature of 300°C and a pressure of 100 atmospheres? (1 mark)(e) Describe and explain what changes should be made to the temperature and pressure to increase the percentage yield of ammonia. (5 marks)(f) Why are the conditions of temperature and pressure which give the maximum yield of ammonia not used in industry? (2 marks)