已知下列键能数据,则反应:SiCl4(g)+2H2(g)Si(s)+4HCl(g)△H为
化学键 |
Si-O |
Si-Cl |
H-H |
H-Cl |
Si-Si |
Si-C |
键能/kJ·mol-1 |
460 |
360 |
436 |
431 |
176 |
347 |
A.236 kJ·mol-1 B.-116 kJ·mol-1
C.-236 kJ·mol-1 D.116 kJ·mol-1