Organic chemistry

• What is the formula for an alkane

  CnH2n+2
• Do alkanes have a single or double bond between carbon atoms ?

  Single
• Why do long-chain hydrocarbons not make good fuel

  They are not very flammable
• What is cracking?

  converting long chain hydro carbons into short chain hydrocarbons
• What is catalytic cracking ?

  Using high temp and a catalyst to speed up the reaction
• What is steam cracking

  using high temperature and steam
• What are the two types of cracking

  Steam cracking and catalytic cracking
• What are alkenes useful ?

  to make chemicals like polymers or a starting materials for other chemicals
• Are alkenes or alkanes more reactive

  Alkenes
• How do you test for Alkenes

  Using bromine water, when the alkene is shaken with bromine water the water turns colourless
• What are some products made from crude oil

  Plastics, petrol, medicine and cosmetics
• how is crude oil formed

  Over millions of years from the remains of tiny seas creatures which are buried in mud and crushed
• What is crude oil

  A mix of Hydrocarbons
• How do you find the number or hydrogen Atoms in a alkane (n)

  CnH2n+2
• what type of molecule is an alkane

  Saturated molecule
• What is the structure of methane

  C=1 H=4
• What is the structure of ethane

  C=2 H=6
• What is the structure of propane

  C=3 H=8
• What is the structure of butane

  C=4 H=10
• What are some examples of a alkane

  Methane, ethane, propane and butane
• What does viscosity tell you

  The thickness of a fluid
• Do fluids with high viscosity flow slow or fast

  slow
• As the size of the hydrocarbon molecules increase,

  The molecule get more viscous
• As the size of the hydrocarbon molecules increases,

  the molecules get less flammable
• Short chain hydrocarbons have low or high boiling points ?

  Low
• What state are hydrocarbons at room temp

  Gas
• does the boiling point of a molecule increase or decrease as the size goes up?

  Increase