A reversible mixture is being assessed for use in a temperature indicator.
The reaction is:
A(aq)⇌B(aq)\text{A(aq)} \rightleftharpoons \text{B(aq)}A(aq)⇌B(aq)
Identical samples of the mixture were allowed to reach equilibrium in closed containers at different temperatures.
| Temperature in °C | Percentage of the mixture present as B at equilibrium |
|---|---|
| 20 | 32 |
| 50 | 58 |
When 1.00 mol of A changes completely to B, the size of the energy transfer is 24 kJ. The direction of the energy transfer was not recorded.
Explain what the results show about the direction and amount of energy transferred when 1.00 mol of B changes completely to A.
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.