(2)
(3)(NH4)2Fe(SO4)2 (4)4OH--4e-===O2↑+2H2O
(5)①4Fe(OH)2+O2+2H2O===4Fe(OH)3
②Fe2O3+2Al高温2Fe+Al2O3
(6)H2(g)+12O2(g)===H2O(l) ΔH=-2ba kJ·mol-1
(2)
(3)(NH4)2Fe(SO4)2 (4)4OH--4e-===O2↑+2H2O
(5)①4Fe(OH)2+O2+2H2O===4Fe(OH)3
②Fe2O3+2Al高温2Fe+Al2O3
(6)H2(g)+12O2(g)===H2O(l) ΔH=-2ba kJ·mol-1
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