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(iii) Indicate, by drawing a curve on Figure 3, how you would expect the concentration
of ozone (O ) in an urban area to vary during the course of the day. Explain your
3
answer.
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[3 marks]
(c) The chemical equation for the formation of ammonia by the Haber Pprocess is as follows.
N (g) + 3H (g) 2NH (g) ∆H = –92 kJ/mol
2 2 3
(i) State the source of nitrogen and name the process by which it is obtained.
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[2 marks]
(ii) Use the equation above to predict the conditions of temperature and pressure which
would maximize the yield of ammonia. DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
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[2 marks]
(iii) State whether the conditions used in industry are similar to those you predicted in
(c) (ii). Account for any variations in these conditions.
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[2 marks]
(iv) Write a balanced chemical equation to show how hydrogen is obtained from
methane, which is a source of hydrogen.
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[2 marks]
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