Changing the temperature

1 mark · Easy

The equation below shows a reversible reaction. The enthalpy change for the forward reaction is . State whether the forward reaction is exothermic or endothermic.

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exothermic

Also accept: The forward reaction is exothermic; Exothermic

Common mistakes: endothermic

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Marking points

B1 · 1 mark · States that the reaction is exothermic (forward, ΔH is negative).

Worked solution

ΔH is negative, which means the forward reaction releases heat; therefore, it is exothermic.