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TGV7:
Combustion
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LINKS |
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Notes
on the video of carbon burning.
Students should notice that
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once the lump
of carbon starts glowing, it keeps glowing without any
further heating from outside |
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the lump of carbon
gets smaller and at the end there is no carbon left
in the tube. |
Notes on the ‘Think for Yourself’ questions
Why is it necessary to heat the carbon to start with?
The carbon must be hot before it
reacts with the oxygen in the air.
Why doesn't the carbon melt?
It has a very high melting point.
It has a giant structure.
Why can the heating be stopped?
The reaction gives out energy, so
it keeps itself hot enough.
One substance is formed in the reaction. What is it likely
to be?
Carbon dioxide.
Why do the lumps of carbon get smaller, and why is there nothing
to see at the end?
The carbon atoms are used to make
carbon dioxide molecules; the carbon dioxide mixes into the
air. We can not see carbon dioxide in the gas state.
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Science Enhancement Programme CD-ROM 2005 |
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user
guide |
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