Energetics

An Exothermic reaction. Acetylene (Ethyne) releases a lot of energy when it burns.

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​Every chemical reaction has an accompanying change in energy.

Some reactions release energy to the surroundings and are known as Exothermic.

Reactions which take in energy from their surroundings are known as Endothermic

When a chemical reaction releases energy  in a useful form substance involved can be used as a fuel

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  • ​This shows a range of chemical changes - all of which release energy .
  • In some cases the energy release is rather sudden.
  • Listen carefully and try to note down the names of the chemicals involved.
  • For each reaction try to write a word equation.
  • Write a symbol equation for each reaction.
  • What is unusual about the last reaction ?

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In this video you can see how a chemical reaction can be used to power a solid fuel rocket.

In this reaction, the chemical reaction releases energy. This is an example of a very exothermic  reaction. 

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