4. Alkanes
• Found in oil and natural gas.
• The longer chain – the higher boiling point. The
first 4 are gases, next 12 fluids, rest solid.
• Each carbon atom has 4 other atom neighbours.
• Good fuels – burns with oxygen.
CH4 + 2O2 -> CO2 + 2H2O + HEAT
(methane + oxygen -> carbondioxide+water+heat)
5. Isomers
• Same formula, but different structure!
Draw a buthane, C4H10!
HH CCCC
H HH
H
H
HH H
H
H
H
H
H
H
HCC C
C
H
H H