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The reaction 4AI (s) + 30 (g) 2Al2O3 (s) is ____, and therefore heat is exothermic, released O thermoneutral, neither released nor absorbed O exothermic,

The reaction 4AI (s) + 30 (g) 2Al2O3 (s) is ____, and therefore heat is exothermic, released O thermoneutral, neither released nor absorbed O exothermic, absorbed O endothermic, released AH = -3351 kJ O endothermic, absorbed by the reaction

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