C9 PPQ mistakes

• ethene is alkene • ethane is alkane • both hyrdocarbon with two bonds • ethane has only single bonds and is saturated • ethene has one double bond so is unsaturatred • Both have simple covalent structure with covalent bonds • Ethene is more reactive than ethane • bromine water test • can react with hyrodgen, water, halogens

• Large hydrocarbons are less useful • Greater demand for small molecules

• Crude oil is heated and then some is vapourised • Gas travels up the column and condense at their boiling point • Hotter at the bottom

• ancient biomass • buried in mud • and compressed • for millions of years

• Temperature gradient in column • kerosene condenses • at boiling point of keresene

• crude oil is vapourised by heating • there is a temperature gradient • gases condense at different levels • due to their different boiling points

• Detergents • Solvents

• cracking • high temperature • steam/catalyst

petrol • cars keresene • air craft fuels desiel • diesel engine petroleum gas • fuel

• Plastic • cosmetics • resins • fertilisers • detergents

• Uses heat to break down a molecule • From long chain alkane to short chain alkane and alkene

• Zeolite catalyst • High temp (lower than steam cracking)

• High temp (750C) • Steam (H2O gas)

• plankton die • covered in sediment • high pressure + high temp • millions of years