Chapter 6 2023/2024
Chapter 6 2023/2024
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The second step in the contact process for producing sulphuric acid, H2SO4, involves the oxidation of sulphur dioxide gas, SO2, to generate sulphur trioxide gas, SO3, as indicated by the reversible equation below.
2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g)
a) Sketch and label the graph to illustrate the change in concentration over time for SO2 gas and SO3 until equilibrium is achieved.
[3 Marks]
b) Equilibrium is achieved when the partial pressure of SO2 gas is 0.364 atm and the total pressure is 0.658 atm at a temperature of 500 oC. Determine the initial pressure of SO2 gas if the initial pressure of O2 gas is 0.250 atm.
[5 Marks]
c) Predict the position of equilibrium if 50% of SO3 gas is removed from the system. .
[1 Mark]
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