化学键 | Si—O | O=O | Si—Si |
键能/ kJ·mol-1 | x | 498.8 | 176 |
A.2H2(g)+ O 2(g) =" "2H2O(1)H =" "—142.9kJ·molˉl |
B.2H2(g)+ O 2(g) =" "2H2O(1)H =" "—571.6kJ·molˉl |
C.2H2+O2 = 2H2OH = —571.6lkJ·molˉl |
D.H2(g)+O 2(g) = H2O(1)H = +285.8kJ·molˉl |
化学键 | Cl-Cl | H—H | H—Cl | N≡N |
键能/kJ·mol | 243 | 436 | 431 | 946 |
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