The reaction 4Al (s) + 3O2 (g) → 2Al2O3 (s) ΔH° = -3351 kJ is __________, and therefore heat is __________ by the reaction.
Added by James V.
Step 1
Since the ΔH° is negative (-3351 kJ), the reaction is exothermic. Show more…
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3O2(g) + 4Al(s) → 2Al2O3(s) ΔHrxn = -3339.6 kJ Calculate the heat associated with the complete reaction of 24.5 g of O2 with 54.0 g of Al. -6.68×10^3 kJ -7.93×10^2 kJ -8.52×10^2 kJ -1.67×10^3 kJ -2.56×10^3 kJ
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The reaction 4 Al (s) + 3O2 (g) ---> 2Al2O3 (s) ΔH = 3351 kJ is ..., and therefore heat is ... by the reaction * endothermic, absorbed * exothermic, released * exothermic, absorbed * thermoneutral, neither released nor absorbed * endothermic, released
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