Two gaseous mixtures are at equilibrium at the same temperature. The equations and percentage yields of product at two pressures are shown.
| Equilibrium | Equation | Percentage yield at 100 kPa | Percentage yield at 300 kPa |
|---|---|---|---|
| 1 | X(g)+2Y(g)⇌2Z(g)\text{X(g)} + 2\text{Y(g)} \rightleftharpoons 2\text{Z(g)}X(g)+2Y(g)⇌2Z(g) | 46 | 68 |
| 2 | M(g)+N(g)⇌P(g)+Q(g)\text{M(g)} + \text{N(g)} \rightleftharpoons \text{P(g)} + \text{Q(g)}M(g)+N(g)⇌P(g)+Q(g) | 52 | 52 |
A student claims that increasing the pressure increases the percentage yield of product in every gaseous equilibrium. Evaluate this claim using the data and equations.
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.