Fuels

• Fuel - a substance which when burned, releases heat energy, then the heat energy can be transferred into electricity
• Hydrocarbons - made from hydrogen and carbon atoms only
• The main constituent of natural gas is methane (CH4)
• 3 kinds of fossil fuels

  -coal

  -petroleum

  -natural gas
• Petroleum is a mixture of different types of hydrocarbons
• Fractional distillation - used to separate a mixture of liquids with different boiling points
• Oil is also a fossil fuel