Fe2O3(s)＋
C(s)===CO2(g)＋2Fe(s) ΔH1＝＋234．1 kJ/mol；C(s)＋O2(g)===CO2(g) ΔH2＝－393．5 kJ/mol；则2Fe(s)＋O2(g)===Fe2O3(s)的ΔH是
| A．－627．6 kJ/mol | B．－824．4 kJ/mol |
| C．－744．7 kJ/mol | D．－169．4 kJ/mol |
Fe2O3(s)＋C(s)===CO2(g)＋2Fe(s) ΔH1＝＋234．1 kJ/mol；C(s)＋O2(g)===CO2(g) ΔH2＝－393．5 kJ/mol；则2Fe(s)＋O2(g)===Fe2O3(s)的ΔH是
| A．－627．6 kJ/mol | B．－824．4 kJ/mol |
| C．－744．7 kJ/mol | D．－169．4 kJ/mol |
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