O-LevelChemistryRates of Reaction5070/11 · May/June 2023 · Q151 Mark
The equation for a reaction in the Contact process is shown. 2SO2(g) + O2(g) ⇋ 2SO3(g) ΔH = –197 kJ/mol The conditions used are 450 °C, 2 atmospheres pressure and a catalyst. What will be the effects when the temperature is reduced to 250 °C and the catalyst is removed?
Apercentage of SO3 in the equilibrium mixture: decrease, rate of the forward reaction: no change
Bpercentage of SO3 in the equilibrium mixture: decrease, rate of the forward reaction: decrease
Cpercentage of SO3 in the equilibrium mixture: increase, rate of the forward reaction: increase
Dpercentage of SO3 in the equilibrium mixture: increase, rate of the forward reaction: decrease
✓ Correct answer
D: percentage of SO3 in the equilibrium mixture: increase, rate of the forward reaction: decrease
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