fuels

• Exothermic reaction - reaction which releases heat energy.
• Endothermic reaction - reaction which takes in heat energy.
• Combustion reaction is when a substance reacts with oxygen and releases energy.
• When hydrocarbons and alcohols react with oxygen, water and carbon dioxide is released.
• Crude oil can be separated into its components by fractional distillation.
• the test for water is that blue cobalt chloride paper turns pink
• the test for carbon dioxide is that limewater turns cloudy
• incomplete combustion can produce carbon monoxide