The Contact Process is used in the industrial manufacture of sulfuric acid. One key stage involves the reversible oxidation of sulfur dioxide to sulfur trioxide:
2SO2(g)+O2(g)⇌2SO3(g)ΔH=−197 kJ mol−1 2\text{SO}_2(\text{g}) + \text{O}_2(\text{g}) \rightleftharpoons 2\text{SO}_3(\text{g}) \quad \Delta H = -197\text{ kJ mol}^{-1} 2SO2(g)+O2(g)⇌2SO3(g)ΔH=−197 kJ mol−1Which row in the table shows the typical conditions of temperature, pressure, and catalyst used in this industrial stage?
| Row | Temperature | Pressure | Catalyst |
|---|---|---|---|
| A | 450 ∘C450\text{ }^\circ\text{C}450 ∘C | 2 atm2\text{ atm}2 atm | Vanadium(V) oxide |
| B | 450 ∘C450\text{ }^\circ\text{C}450 ∘C | 200 atm200\text{ atm}200 atm | Iron |
| C | 250 ∘C250\text{ }^\circ\text{C}250 ∘C | 2 atm2\text{ atm}2 atm | Platinum |
| D | 450 ∘C450\text{ }^\circ\text{C}450 ∘C | 200 atm200\text{ atm}200 atm | Vanadium(V) oxide |
Row A
Row B
Row C
Row D
Practise Edexcel GCSE Chemistry Reversible reactions and equilibria with exam-style questions for Foundation and Higher tier. 38 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.
