Energy Changes

ChemistryIntermediate Level

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Question

What is the difference between exothermic and endothermic reactions?

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Answer

Definition

Exothermic reactions release energy, usually in the form of heat, while endothermic reactions absorb energy from their surroundings.

Example

Burning wood is exothermic because it releases heat, while photosynthesis in plants is endothermic as it requires energy from sunlight.

Quick Tip

Exothermic = exit energy; Endothermic = enter energy.

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