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Chemical energy: Energy flow diagrams
Energy flow diagrams

Energy flow diagrams show what is happening to a particular type of energy as it is used or changed in some process or situation.

Energy flow diagrams can be extended to include other forms of energy, such as light energy, electrical energy and heat energy.
Energy flow diagram for a battery operated shaver

Chemical energy is very useful because it can be stored for long periods of time. It can also be used to produce many other forms of energy.


For example, chemical energy in batteries can be stored for long periods of time, and can be used to produce other forms of energy such as light and heat.
Energy flow diagram for an electric circuit

  1. Create an energy flow diagram for a battery-powered television set. Remember that television sets also give out some heat energy.
  2. Draw an energy flow diagram for a car that uses petrol as its source of energy.


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