chemistry topic 7

• What is crude oil?


  The remains of biomass made from plankton and mud
• what are the compounds in crude oil

  hydrocarbons
• what are alkane molecules


  single C-C
• what are four alkanes

  methane, ethane, propane, butane
• what are fractional distillation for

  to produce fuels and feedstock
• what do longer hydrocarbons do


  condense into liquid early
• What do shorter hydrocarbons do


  condense into liquid later
• how dose the oil turn into gas

  it's boiled and evaporated
• what influences how hydrocarbons are used

  boiling point, viscosity and flammability
• complete combustion equation


  hydrocarbon + oxygen = carbon dioxide + water
• What is craking of hydrocarbons do

  produce more useful molecules
• what are the methods of cracking

  stem, catalytic
• what colour change happened when bromine and water react with an alkene

  colourless
• Example of cracking allenes