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已知:2H2(g)+O2(g)=2H2O(g)ΔH1①,3H2(g)+Fe2O3(s)=2Fe(s)+3H2O(g) ΔH2②,2Fe(s)+3/2O2(g)=Fe2O3(s) ΔH3③,2Al(s)...

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