Loading…
Loading…
GCSE Chemistry · key term
The amount or percentage of product present when equilibrium has been reached under stated conditions.
Used by AQA and Edexcel
Specification 4.10.4.1 · Paper 2
Revise: The Haber ProcessIncreasing the pressure shifts the equilibrium position towards the side with fewer gas molecules, so it favours ammonia and increases the equilibrium yield. It also pushes particles closer together, causing more frequent collisions and increasing the reaction rate.
Specification 5.21C · Paper 1
Equilibrium yield is the amount of product present when a reversible reaction has reached equilibrium under specified conditions.
Revise: Conditions in Industrial ReactionsA temperature around 450 °C is commonly used as a compromise, rather than because it gives the highest possible equilibrium yield.
Keep rate and equilibrium yield separate: a lower temperature improves the equilibrium yield but makes the reaction slower.
For temperature, distinguish the effect on the equilibrium yield from the effect on reaction rate.
Do not say that an iron catalyst increases the equilibrium yield: it speeds up both directions of the reaction.
Create a free account to read GCSE Chemistry revision notes for your exam board and track your progress.