Given the balanced equation:
4Fe (s) + 3O2 (g) = = >2Fe2O3 (s) + 1640 kJ
Which phrase best describes this reaction?
(1) endothermic with DH = + 1640 kJ
(2) endothermic with DH = - 1640 kJ
(3) exothermic with DH = + 1640 kJ
(4) exothermic with DH = - 1640 kJ
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