已知：①Fe2O3(s)＋
C(s)===CO2(g)＋2Fe(s) ΔH＝+234.1 kJ·mol－1
②C(s)＋O2(g)＝CO2(g) ΔH＝－393.5 kJ·mol－1
则2Fe(s)＋O2(g)===Fe2O3(s)的ΔH是( )
| A．－824.4 kJ·mol－1 | B．－627.6kJ·mol－1 |
| C．－744.7kJ·mol－1 | D．－168.4kJ·mol－1 |
已知：①Fe2O3(s)＋C(s)===CO2(g)＋2Fe(s) ΔH＝+234.1 kJ·mol－1
②C(s)＋O2(g)＝CO2(g) ΔH＝－393.5 kJ·mol－1
则2Fe(s)＋O2(g)===Fe2O3(s)的ΔH是( )
| A．－824.4 kJ·mol－1 | B．－627.6kJ·mol－1 |
| C．－744.7kJ·mol－1 | D．－168.4kJ·mol－1 |
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