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