依据下表判断CH3CH3CH2=CH2+H2的反应热为
化学键 |
C-H |
C=C |
C-C |
H-H |
键能(kJ·mol-1) |
414.4 |
615.3 |
347.4 |
435.3 |
A.125.6kJ·mol-1 B.-125.6kJ·mol-1
C.46.1kJ·mol-1 D.-46.1kJ·mol-1
依据下表判断CH3CH3CH2=CH2+H2的反应热为
化学键 |
C-H |
C=C |
C-C |
H-H |
键能(kJ·mol-1) |
414.4 |
615.3 |
347.4 |
435.3 |
A.125.6kJ·mol-1 B.-125.6kJ·mol-1
C.46.1kJ·mol-1 D.-46.1kJ·mol-1