organic chem

• crude oil 


  resource found in the rocks its made from hydrocarbons
• hydrocarbons -boiling point increase with chain length and the longer in chain it needs more energy to be broken
• crude oil is alkalene
• methane CH*4


  saturated because its been bonded 4 times
• hydrocarbons


  hydrogen and carbons
• the shorter the carbon chain ,the more flammable
• crude oil is a fossil fuel that is formed from the remains of ancient plants and animals
• crude oil is a mixture of hydrocarbons, which are long chains of hydrogen and carbon atoms
• what is cracking 


  its a thermal decomposition breaking molecules down by heating
• fractional distillation separates crude oil into different fractions based on their boiling points
• what is a homologous series

  series of compounds with same general formula
• what type of reaction is cracking

  thermal decomposition
• what is a alkene


  its a unsaturated hydrocarbon Cn H2n
• whats the test for alkene

  add bromine water. colour changes occurs from orange to colourless
• describe the combustion of alkenes

  they burn with smoky flame due to incomplete combustion
• what is a polymer? how do molecules containing c=c bond form polymers

  a polymer is a long chain molecule which is made by lots of smaller molecules
• meth

  1 carbon
• eth

  2 carbons
• prop

  3 carbons
• but

  4 carbons
• alkanes


  are made of single - covalently bonded carbon atoms surrounded by hydrogen atoms.( alkanes are saturated)
• an alkene is a hydrocarbon with at least one

  double covalent bond
• how to test for alkenes

  alkenes will turn bromine water from orange to colourless, this is due to the bromine atoms bonding to the alkene breaking the double bond. the molecule is saturated