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| G4.2
USING THE PARTICLE THEORY TO EXPLAIN THE DIFFERENCES |
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LINKS |
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Evaporation
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The
water particles leave one by one
from the surface to form
a mixture with the air
particles. |
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We
cannot see the individual particles leaving.
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At
any temperature, there will be some high
energy particles for this to happen. |
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Boiling
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A bubble is a pure
sample of water in the gas state that
forms inside the liquid water
(where it is being heated).
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It takes
more than one particle to form
a bubble. This means there have to be enough
high energy water particles able to overcome the
hold at the same time. |
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There are
only enough high energy water particles when the
temperature reaches 100ºC.
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While this
is happening, some individual particles will also
leave from the surface.
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| a
Science Enhancement Programme CD-ROM 2005 |
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user
guide |
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