Q. Correct order of stability is :
Hydrocarbons
Solution:
Stability of an alkene depends upon the heat of hydrogenation of an alkene. The heat of hydration is the standard enthalpy change in hydrogenation of on alkene. The lower the heat of hydrogenation of an alkene higher will be the stability.
Order of stability
Heat of hydrogenation (kJ/mol)
trans-2 -butene
-115.5
cis-2 -butene
-119.6 and
1-butene
-126.8 respectively.
| Order of stability | Heat of hydrogenation (kJ/mol) |
|---|---|
| trans-2 -butene | -115.5 |
| cis-2 -butene | -119.6 and |
| 1-butene | -126.8 respectively. |