hydrocarbons

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  • Created by: rxbyw
  • Created on: 26-03-19 06:40

a hydrocarbon is a molecule formed from carbon and hydrogen atoms only.

alkanes are the simplest types of hydrocarbons

carbon atoms form 4 bonds and hydrogen 1 bond

there are no double carbon-carbon bonds in alkanes

all the atoms form bonds with as many other atoms as possible-they are saturated

methane has one carbon atom

ethane has two carbon atoms

propane has three carbon atoms

butane has four carbon atoms

formula for alkanes:

CnH2n+2

properties of hydrocarbons:

the shorter the molecules...

the less viscous it is

the lower the boiling point

the more flammable the hydrocarbon is

the complete combustion of hydrocarbons:
hydrocarbon+oxygen-carbon dioxide+water

fractional distillation of crude oil:
crude oil is a mixture of different compouds formed from the remains of plants and animals

crude oil is a finite rescource - it cannot be replaced when used up

most of the compounds in crude oil are hydrocarbon molecules and alkanes

crude oil is separated into groups of hydrocarbons by fractional distillation

the fractionating column has a temperature gradient-hot at the bottom and cool at the top

1. crude oil is heated and evaporated

2. gas rises up the column and cools

3. different compounds in the mixture have different boiling…

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