已知①C(s)+H2O(g)=CO(g)+H2(g) △H="a" kJ/mol,②2C(s)+O2(g)=2CO(g) △H="-220" kJ/mol H-H、O=O和O-H键的键能分别为436、496和462 kJ/mol,则a为()
A.-332 | B.-118 | C.+350 | D.+130 |
已知①C(s)+H2O(g)=CO(g)+H2(g) △H="a" kJ/mol,②2C(s)+O2(g)=2CO(g) △H="-220" kJ/mol H-H、O=O和O-H键的键能分别为436、496和462 kJ/mol,则a为()
A.-332 | B.-118 | C.+350 | D.+130 |