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Alkenes by Mind Map: Alkenes

1. C2H4(g) + Cl2(g) -> C2H4Cl2 (l)

2. C2H4 + H2 -> C2H6

3. room temperature

4. halogens as reagents

5. C18H38 -> 9C2H4 + H2

6. Alkenes are compounds containing a Carbon-Carbon double bond.

7. ethene to ethane

8. 60 atm

9. product

9.1. e.g.

10. CONDITIONS

11. C=C bond present in each monomer

12. e.g.

12.1. ethene to ethanol

12.1.1. C2H4 + H2O -> C2H5OH

13. 5 atm

14. 200°C

15. usually colourless

16. Ni (nickel) catalyst

17. ethanol is used as solvent and fuel

18. C18H38 -> C6H14 + 6C2H4 big alkane-> alkane+six alkenes

19. production of HYDROGEN gas

20. through cracking of alkanes

21. Cracking

21.1. conversion of long chains of hydrocarbons to shorter chains

21.2. Pertroleum(crude oil)

21.2.1. big hydrocarbon molecules in it broken down to smaller hydrocarbon molecules

21.2.2. smaller hydrocarbon molecules used for fuel

21.2.2.1. C18H38 -> C8H18 + C10H20 big alkane -> alkane+alkene

21.2.2.1.1. usually, a mixture of alkenes AND alkanes is produced

21.2.2.1.2. e.g.

22. Halogenation

22.1. CONDITIONS

22.1.1. 300°C

22.1.1.1. H3PO4 (phosphoric acid) catalyst

22.2. is the addition of halogens

23. Hydration

23.1. product

23.1.1. alcohol

23.2. is the addition of steam

24. Hydrogenation

24.1. e.g.

24.1.1. vegetable oil to margarine

24.1.2. is the addition of hydrogen

25. production of ETHENE

25.1. to make ehtanol and plastics(polyethene)

25.2. in the absence of light

26. CONDITIONS

27. Alkenes are insoluable in water, however are very soluble in organic solvents.

27.1. general formula

27.1.1. CnH2n

28. alkenes