Alkenes
by CHEW JIA YU REGINE .

1. is the addition of steam
2. C2H4(g) + Cl2(g) -> C2H4Cl2 (l)
3. C2H4 + H2 -> C2H6
4. room temperature
5. halogens as reagents
6. Alkenes are compounds containing a Carbon-Carbon double bond.
7. ethene to ethane
8. 60 atm
9. product
9.1. e.g.
10. e.g.
10.1. ethene to ethanol
10.1.1. C2H4 + H2O -> C2H5OH
11. usually colourless
12. ethanol is used as solvent and fuel
13. through cracking of alkanes
14. Halogenation
14.1. CONDITIONS
14.1.1. 300°C
14.1.1.1. H3PO4 (phosphoric acid) catalyst
14.2. is the addition of halogens
15. Hydration
15.1. product
15.1.1. alcohol
16. Hydrogenation
16.1. e.g.
16.1.1. vegetable oil to margarine
16.1.2. is the addition of hydrogen
17. production of ETHENE
17.1. to make ehtanol and plastics(polyethene)
17.2. in the absence of light
18. Alkenes are insoluable in water, however are very soluble in organic solvents.
18.1. general formula
18.1.1. CnH2n
19. C18H38 -> 9C2H4 + H2
20. CONDITIONS
21. C=C bond present in each monomer
22. 5 atm
23. 200°C
24. Ni (nickel) catalyst
25. C18H38 -> C6H14 + 6C2H4 big alkane-> alkane+six alkenes
26. production of HYDROGEN gas
27. Cracking
27.1. conversion of long chains of hydrocarbons to shorter chains
27.2. Pertroleum(crude oil)
27.2.1. big hydrocarbon molecules in it broken down to smaller hydrocarbon molecules
27.2.2. smaller hydrocarbon molecules used for fuel
27.2.2.1. C18H38 -> C8H18 + C10H20 big alkane -> alkane+alkene
27.2.2.1.1. usually, a mixture of alkenes AND alkanes is produced
27.2.2.1.2. e.g.