Sulfur trioxide is formed in the reversible reaction shown.
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)
The starting proportions of the gases and the temperature were the same in each experiment.
| Pressure in kPa | Equilibrium yield of sulfur trioxide in % |
|---|---|
| 150 | 64 |
| 300 | 75 |
A student states, “Doubling the pressure doubles the equilibrium yield of sulfur trioxide.”
Evaluate the student's statement. Use the table and the equation.
109 exam-style questions on AQA GCSE Chemistry 6.2 Reversible reactions and dynamic equilibrium, covering 6.2.1 Reversible reactions, 6.2.2 Energy changes and reversible reactions, 6.2.3 Equilibrium, 6.2.4 The effect of changing conditions on equilibrium, 6.2.5 The effect of changing concentration, 6.2.6 The effect of temperature changes on equilibrium, and 6.2.7 The effect of pressure changes on equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.