2 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.
2.1 What is condensation???
2.1.1 Definition of
Condensation is when
a gas turns to a liquid.
3 Cooling by evaporation: what is it???
3.1 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.
3.1.1 How does it work: The coolinh by
evaporation of a liquid is all down to the
fast moving molecules escaping from the liquid.
4 There are ways of which we can increase the speed of these two processes.
4.1 Evaporation can be increased by:
4.1.1 1) Increasing the surface area of the liquid
4.1.2 2) Increasing the temperature of the liquid
4.1.3 3) Creating a draught of air across the liquids surface