Changing the temperature
2 marks · NormalExplain what happens to the position of equilibrium when temperature is increased in a reversible reaction.
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Also accept: Equilibrium shifts to favour the endothermic direction.; The position shifts towards the reaction that absorbs heat.
Common mistakes: Saying temperature has no effect; Mixing up endothermic/exothermic
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Marking points
B1 · 1 mark · States the equilibrium shifts towards the endothermic direction.
B2 · 1 mark · Explains that this direction absorbs the extra heat.
Worked solution
When the temperature is increased, the equilibrium shifts in the direction of the endothermic reaction because that direction absorbs heat and reduces the effect of the temperature increase.