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LNgo 1G wrote:In a reaction where X2 -> 2X is it considered endothermic or exothermic and why? (X stands for any element)
If bonds are broken, it requires energy, thus in the reaction that you gave, it would be endothermic (requires energy to proceed).
If bonds are created, it releases energy, thus in the reverse reaction you gave, it would be exothermic (releases energy to proceed).
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