A chemical company makes product P using a reversible reaction.
Tests were carried out using the same starting amounts and pressure.
| Temperature in ∘C^\circ\text{C}∘C | Equilibrium yield of P in % | Time taken to reach equilibrium in minutes |
|---|---|---|
| 300 | 88 | 96 |
| 420 | 70 | 18 |
| 540 | 49 | 5 |
The company uses a temperature of 420 ∘C420\ ^\circ\text{C}420 ∘C.
Explain why the company uses 420 ∘C420\ ^\circ\text{C}420 ∘C rather than 300 ∘C300\ ^\circ\text{C}300 ∘C or 540 ∘C540\ ^\circ\text{C}540 ∘C.
Use data from the table.
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.