SSCE VCE Chemistry Extent of Chemical Reactions: Ammonia is prepared industrially

Ammonia is prepared industrially from hydrogen and nitrogen in the presence of a suitable catalyst according to the equation $$N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$$ The graph below shows the variation of the equilibrium yield of ammonia with pressure at different temperatures - VCE - SSCE Chemistry - Question 4 - 2002 - Paper 1

Question 4

$Ammonia-is-prepared-industrially-from-hydrogen-and-nitrogen-in-the-presence-of-a-suitable-catalyst-according-to-the-equation--$$N_2(g)-+-3H_2(g)-\rightleftharpoons-2NH_3(g)$$--The-graph-below-shows-the-variation-of-the-equilibrium-yield-of-ammonia-with-pressure-at-different-temperatures-VCE-SSCE Chemistry-Question 4-2002-Paper 1.png$

Ammonia is prepared industrially from hydrogen and nitrogen in the presence of a suitable catalyst according to the equation $$N_2(g) + 3H_2(g) \rightleftharpoons 2... show full transcript

Worked Solution & Example Answer:Ammonia is prepared industrially from hydrogen and nitrogen in the presence of a suitable catalyst according to the equation $$N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$$ The graph below shows the variation of the equilibrium yield of ammonia with pressure at different temperatures - VCE - SSCE Chemistry - Question 4 - 2002 - Paper 1

Step 1

a. Determine the percentage yield of ammonia at 300 atm and 500°C

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Answer

From the graph, locate the point where the pressure is 300 atm. Then, find the corresponding line for the temperature of 500°C. The intersection of this line with the vertical axis will show that the percentage yield of ammonia is approximately 24%.

Step 2

b. State Le Chatelier’s principle

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Answer

Le Chatelier’s principle states that if an external change is applied to a system in equilibrium, the system will adjust itself to counteract the change and re-establish equilibrium.

a. Determine the percentage yield of ammonia at 300 atm and 500°C

b. State Le Chatelier’s principle

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