Problem: Identify each of the following processes as endothermic or exothermic and indicate the sign of ∆H.a) ice cube meltingb) water freezing in a freezerc) wood burning in a fire

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We’re being asked to classify each given reaction as exothermic or endothermic


Recall that:

Exothermic reactions: lose energy and involve bonds breaking; ΔH is negative

Endothermic reactions: gain energy and involve bonds forming; ΔH is positive


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Problem Details

Identify each of the following processes as endothermic or exothermic and indicate the sign of ∆H.

a) ice cube melting

b) water freezing in a freezer

c) wood burning in a fire

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