Example of Condensation: In a steamy
bathroom, a mirror is often covered with a film of
water. As there are lots of water molecules in the
air, some of them hit the mirror, cool down and
stay there. This is a process called condensation.
What is condensation???
Definition of
condensation:
Condensation is when
a gas turns to a liquid.
Cooling by evaporation: what is it???
Example of Cooling by Evaporation: When you are at the
doctor before an injection the nurse may 'numb' your skin
so you don't feel any pain, by dabbing a liquid that
evaporates easily onto your skin. The liquid will evaporate
and your skin will feel to cold to feel pain.
How does it work: The coolinh by
evaporation of a liquid is all down to the
fast moving molecules escaping from the liquid.
There are ways of which we can increase the speed of these two processes.
Evaporation can be increased by:
1) Increasing the surface area of the liquid
2) Increasing the temperature of the liquid
3) Creating a draught of air across the liquids surface