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The percentage of ammonia obtainable, if equilibrium were established during the Haber process, is plotted against the operating pressure for two temperatures, 400°C and 500°C - CIE - A-Level Chemistry - Question 11 - 2010 - Paper 1
Question 11
The percentage of ammonia obtainable, if equilibrium were established during the Haber process, is plotted against the operating pressure for two temperatures, 400°C... show full transcript
Worked Solution & Example Answer:The percentage of ammonia obtainable, if equilibrium were established during the Haber process, is plotted against the operating pressure for two temperatures, 400°C and 500°C - CIE - A-Level Chemistry - Question 11 - 2010 - Paper 1
Step 1
Identify the variables and relationships
Answer
In this question, we need to analyze how equilibrium percentages of ammonia differ at two distinct temperatures (400°C and 500°C) when plotted against different pressures. According to Le Chatelier's principle, increasing pressure will favor the production of ammonia in the reaction.
Step 2
Analyze the temperature effect
Answer
The behavior of the system at higher temperatures, like 500°C, generally leads to a lower percentage of ammonia due to the endothermic nature of the reaction. Conversely, at 400°C, we expect a higher yield of ammonia under the same pressure conditions.
Step 3
Select the correct graph based on the analysis
Answer
Given the relationships we've established, we deduce that the graph showing the 400°C line above the 500°C line for all pressures represents the correct relationship. Therefore, option A is the graph that correctly represents the two temperature graphs.