The reaction 4Al (s) + 3O₂ (g) → 2Al₂O₃(s) ΔH° = -3351 kJ Is ________, and therefore heat is ________ by the reaction. A)endothermic, released B)endothermic, absorbed C)exothermic, released D)exothermic, absorbed E)thermoneutral, neither released nor absorbed

Question

Quizplus · Accepted Answer

The negative sign for ΔH° indicates that the reaction is exothermic, meaning heat is released by the reaction. Therefore, the correct choice is (C) exothermic, released.

The Reaction 4Al (S) + 3O2 (G) → 2Al2O3 (s)

The Reaction 4Al (S) + 3O₂ (G) → 2Al₂O₃(s)