Sulfur trioxide is manufactured during the Contact process.
The equation for the key reversible reaction is:
2SO2(g)+O2(g)⇌2SO3(g) 2\text{SO}_2(\text{g}) + \text{O}_2(\text{g}) \rightleftharpoons 2\text{SO}_3(\text{g}) 2SO2(g)+O2(g)⇌2SO3(g)A vanadium(V) oxide catalyst is used in this reaction.
Which row correctly shows how adding the vanadium(V) oxide catalyst affects the rate of attainment of equilibrium and the equilibrium yield of sulfur trioxide (SO3\text{SO}_3SO3)?
Rate of attainment of equilibrium: decreases; Equilibrium yield of SO3\text{SO}_3SO3: increases
Rate of attainment of equilibrium: increases; Equilibrium yield of SO3\text{SO}_3SO3: does not change
Rate of attainment of equilibrium: increases; Equilibrium yield of SO3\text{SO}_3SO3: increases
Rate of attainment of equilibrium: decreases; Equilibrium yield of SO3\text{SO}_3SO3: does not change
Practise Edexcel GCSE Chemistry Dynamic equilibria with exam-style questions for Foundation and Higher tier. 30 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
