By David Fowkes on Thursday, 22 March 2018
Category: IGCSE Chemistry

Energetics old

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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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combustion of energies of alkanes
Infogram

​Seriously Exothermic

 The hydrocarbon compound Ethyne  will burn with a very hot flame. Ethyne is also known as Acetylene. An oxyacetylene torch will cut through steel plate and will even burn underwater!

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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 an EXOTHERMIC reaction. 

 Heating water 

Why does the balloon not pop?

What does the narrator say about the heat capacity of the water

can we use this data?