AQA · Chemistry · 8462

GCSE Chemistry: The effect of temperature changes on equilibrium

The rate and extent of chemical change · AQA GCSE Chemistry (8462), specification point 4.6.2.6. Cards are generated from the exam board's own specification for "The effect of temperature changes on equilibrium", and every card links back to the page it came from. Higher tier only. Specification © AQA — used with attribution.

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What happens to the relative amount of products at equilibrium when the temperature of an endothermic reaction is increased?
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It increases.
What happens to the relative amount of products at equilibrium when the temperature of an exothermic reaction is increased?
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It decreases.
What happens to the relative amount of products at equilibrium when the temperature of an endothermic reaction is decreased?
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It decreases.
What happens to the relative amount of products at equilibrium when the temperature of an exothermic reaction is decreased?
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It increases.
Increasing the temperature of a system at equilibrium favours the ? direction of the reaction.
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endothermic
Decreasing the temperature of a system at equilibrium favours the ? direction of the reaction.
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exothermic
Why does raising the temperature increase the yield of an endothermic reaction at equilibrium?
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The equilibrium shifts in the direction that absorbs heat (the endothermic direction) to oppose the temperature rise, so more products form.
The forward reaction of a system at equilibrium is exothermic. To increase the equilibrium yield of products, should the temperature be raised or lowered?
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Lowered — cooling shifts the equilibrium in the exothermic (forward) direction, increasing the relative amount of products.
The forward reaction of a system at equilibrium is endothermic. To increase the equilibrium yield of products, should the temperature be raised or lowered?
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Raised — heating shifts the equilibrium in the endothermic (forward) direction, increasing the relative amount of products.

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All questions and answers

What happens to the relative amount of products at equilibrium when the temperature of an endothermic reaction is increased?

What happens to the relative amount of products at equilibrium when the temperature of an exothermic reaction is increased?

What happens to the relative amount of products at equilibrium when the temperature of an endothermic reaction is decreased?

What happens to the relative amount of products at equilibrium when the temperature of an exothermic reaction is decreased?

Increasing the temperature of a system at equilibrium favours the ? direction of the reaction.

Decreasing the temperature of a system at equilibrium favours the ? direction of the reaction.

Why does raising the temperature increase the yield of an endothermic reaction at equilibrium?

The forward reaction of a system at equilibrium is exothermic. To increase the equilibrium yield of products, should the temperature be raised or lowered?

The forward reaction of a system at equilibrium is endothermic. To increase the equilibrium yield of products, should the temperature be raised or lowered?