O Levels Chemistry (5070)•5070/12/O/N/18
Explanation
Contact Process Conditions for Sulfuric Acid Production
Steps:
- Identify the Contact Process as the industrial method for sulfuric acid via SO₂ oxidation to SO₃.
- Recall optimal temperature of 450°C balances reaction rate and equilibrium yield.
- Note atmospheric pressure (1 atm) suffices due to minimal volume change in the reaction.
- Confirm vanadium pentoxide (V₂O₅) as the catalyst for efficient SO₃ formation.
Why D is correct:
- Matches the standard conditions: 450°C optimizes kinetics and thermodynamics per Le Chatelier's principle, 1 atm is economical, and V₂O₅ catalyzes the exothermic reaction effectively.
Why the others are wrong:
- A: 100°C is too low for practical reaction rate.
- B: 300°C and 1000 atm are incorrect; Fe is Haber process catalyst.
- C: Fe catalyst is wrong; V₂O₅ is required for SO₂ oxidation.
Final answer: D
Topic: Reversible reactions and equilibrium
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