5 (a) Complete and balance the chemical equation for the production of ammonia from nitrogen and hydrogen - AQA - GCSE Chemistry - Question 5 - 2014 - Paper 3
Question 5
5 (a) Complete and balance the chemical equation for the production of ammonia from nitrogen and hydrogen.
$$N_2 + 3H_2 \rightleftharpoons 2NH_3$$
5 (b) Figure 5 s... show full transcript
Worked Solution & Example Answer:5 (a) Complete and balance the chemical equation for the production of ammonia from nitrogen and hydrogen - AQA - GCSE Chemistry - Question 5 - 2014 - Paper 3
Step 1
Complete and balance the chemical equation for the production of ammonia from nitrogen and hydrogen.
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Answer
The balanced chemical equation for the production of ammonia is:
N2+3H2⇌2NH3
Step 2
Use the information in Figure 5 to complete the sentence.
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Answer
The temperature on the graph that gives the highest yield of ammonia is 200 °C.
Step 3
Why is a temperature much lower than 450 °C not used for the Haber process?
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Answer
A temperature much lower than 450 °C is not used for the Haber process because the rate of reaction would be too slow, leading to an inefficient production of ammonia.
Step 4
Use the information in Figure 5 to answer this question. Draw a ring around the pressure that gives the highest yield of ammonia.
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Answer
The pressure that gives the highest yield of ammonia is 400 atmospheres.
Step 5
Why is a pressure lower than 200 atmospheres not used for the Haber process?
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Answer
A pressure lower than 200 atmospheres is not used because it would result in a lower yield of ammonia and would not favor the forward reaction as per Le Chatelier's principle.
Step 6
Explain how ammonia is separated from unreacted nitrogen and hydrogen in the Haber process.
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Answer
In the Haber process, the ammonia is first cooled to allow it to liquefy, separating it from the unreacted nitrogen and hydrogen gases, which remain in their gaseous state.
