Reacție exotermă

O reacție puternic exotermă este reducerea oxidului de fier (III) cu aluminiu.

O reacție exotermă este orice reacție chimică prin care se produce energie sub formă de lumină sau căldură.[1] Altfel spus, o reacție exotermă presupune o variație negativă de entalpie, care se notează -ΔH (ΔH<0). Pentru o reacție în care avem reactanții A, B și produșii de reacție C, D, reacția exotermă se poate nota prim următoarea ecuație chimică:

A + B → C + D + Q (energie)

Din punct de vedere energetic, se consideră că pentru inițierea unei reacții exoterme se consumă o energie mai mică decât energia degajată în urma reacției chimice.[2]

Exemple

Vezi și

Note

  1. ^ Anne Marie Helmenstine, „Endothermic and Exothermic Reactions”, thoughtco.com, accesat în  
  2. ^ „Endothermic and Exothermic Reactions”. About Chemistry. . Arhivat din original la . Accesat în . 

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