79587
Evapouration, Condensation, Convection, Conduction And Radiation
- Conduction
- Conduction occurs
mainly in solids
- if one end of the solid is heated
the paticles at the end gain
kinetic energy an vibrate more
- the energy is passed to neighbouring
particles and in this way the energy is
transferred through the solid.
- when metals are heated their free
electrons gain kinetic energy and move
through the metal, transferring energy by
colliding with other particles hence all
metals are good conductors
- Conduction occurs
mainly in solids
- Convection
- Convection is the circulation
of a fluid (liquid or gas)
caused by heating it
- convection takes place
only in liquids and gasses
- Heating a liquid or a gas make it
less dense so it rises and
causes circulation
- The hot fluid rises and the cold fluid sinks
as that warms it rises and so goes round in
a circle.
- Convection is the circulation
of a fluid (liquid or gas)
caused by heating it
- radiation
- Dark, matt surfaces emit infrared
radiation more quickly than light
shiny surfaces
- Dark, matt surfaces absorb
infrared radiation more
quickly than light, shiny
surfaces.
- Light, shiny surface
reflect more infrared
radiation than Dark, matt
surfaces
- Dark, matt surfaces emit infrared
radiation more quickly than light
shiny surfaces
- evapouration
- The average kinetic energy of the remaining
mollecules is less, so the tempreature of the
liquid decreases causing cooling.
- Takes place because the most
energetic liquid molecules escape
from the liquid's surface and enter the
air
- when a liquid turns
into a gas.
- rate of evapouration increased by: -increasing the surface
area , -increasing the tempreature of the liquid and -
creating a draught of air across the liquids surface
- dchd
- The average kinetic energy of the remaining
mollecules is less, so the tempreature of the
liquid decreases causing cooling.
- condensation
- condensation is when a
liquid hits a cold surface and
turns into a liquid
- the rate of condensation is increased
by: -increasing the surface area and
-reducing the surface tempreature
- condensation is when a
liquid hits a cold surface and
turns into a liquid
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