已知:C(s)+H2O(g)→CO(g)+H2(g) △H=a kJ/mol
C(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:C(s)+H2O(g)→CO(g)+H2(g) △H=a kJ/mol
C(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 |