Changing the temperature
2 marks · NormalState how changing the temperature affects the position of equilibrium in a reversible reaction.
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Also accept: Increasing temperature shifts equilibrium to favour the endothermic direction; decreasing temperature shifts equilibrium to favour the exothermic direction.; Raises temperature: favours endothermic reaction; lowers temperature: favours exothermic reaction.
Common mistakes: Saying temperature has no effect; Mixing up endothermic/exothermic directions
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Marking points
B1 · 1 mark · States that increasing temperature favours the endothermic direction.
B2 · 1 mark · States that decreasing temperature favours the exothermic direction.
Worked solution
Increasing the temperature shifts the position of equilibrium towards the endothermic direction.
Decreasing the temperature shifts the equilibrium towards the exothermic direction.