energy from fuels

• exothermic reactions are ones which energy is released from it's surroundings
• endothermic reaction take energy from its surroundings
• a fuel is something that is burned to release energy.
• compleate combustion is when a fuel is burned in a plentiful supply of oxygen
• complete combustion produces the products - carbon dioxide and water
• incomplete combustion occurs when there isn't enough oxygen available, so not all the fuel burns completely
• incomplete combustion produces carbon monoxide and soot (carbon)
• the energy released in the burning of a fuel can be calculated by using the energy equation: energy = mass x specific heat capacity x temperature