Alkenes Flashcards
1
Q
What are alkenes?
A
Unsaturated hydrocarbons which have at least one carbon-carbon double bond
2
Q
Why are alkenes more reactive than alkanes?
A
More atoms can be easily added to the carbon at the double bond
3
Q
Alkene general formula
A
C(n)H(2n)
4
Q
Ethene
A
C2H4
5
Q
Propene
A
C3H6
6
Q
Butene
A
C4H8
7
Q
Combustion of alkenes
A
Alkene + oxygen —> carbon dioxide + water
eg) C4H8 + 6O2 —> 4CO2 + 4H2O
8
Q
Addition reactions of alkenes (hydrogen)
A
Alkene + hydrogen —> alkane
eg) C3H6 + H2 —> C3H8 (unsaturated to saturated)
9
Q
Addition reactions of alkenes (halogens)
A
Alkene + chlorine —> dichloroalkane
e) C3H6 + Cl2 —> C3H6Cl2
