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Chemistry · L3 · Exothermic Reaction — Energy Diagram

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Reactants climb a small activation-energy hill, then drop below their starting energy — heat is released to the surroundings and ΔH is negative.

by @openstemUpdated Chemistry
Reactantshigher starting energyActivated Complexpeak of the hill: EaProductslower energy than reactantsHeat released tosurroundings: ΔH negative

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