Heating malachite - fact sheet by mburr

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									                 Heating malachite          -       fact sheet


Malachite is mainly copper carbonate, CuCO3


When this is heated, it splits up or decomposes


   copper carbonate      =   copper oxide       +     carbon dioxide

     CuCO3               =       CuO            +       CO2




When one substance splits up into two or more on heating, we call
this ‘THERMAL DECOMPOSITION’

The carbon dioxide gas is lost to the air, so the copper carbonate loses mass.
The copper oxide weighs less than the copper carbonate.

However,

 The mass of the copper carbonate equals the total mass of the
copper oxide and carbon dioxide. The same atoms are present,
but they are combined in different ways

								
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