erasmus head in the clouds - colapso da lata
TRANSCRIPT
“Soda can collapse”
Physical experiment from class 8ºB2016-2017
Objective
Let’s study the effects of atmospheric pressure on
the surface of a empty soda can!
Material
1• 1 Circular
glass dish2 •1 hot plate
3 •1 beaker tongue
4 •1 Empty soda can
5 •Water
6 •Ice
7 •Squeeze bottle lab
Put ice in a circular glass dish with water; Put a little water in an empty soda can; Place the can on a hot plate; When steam starts off, grab the can with
tongs; Quickly turn opening into the cold water; Observe what happens.
Procedure
Discuss and debate
Debate ideas with your colleagues, share your thoughts and analyze what happened, looking up information.
A change in the physical state of the water occurs inside of the can: it goes from liquid to vapor. When the can is placed in contact with the cold water that cools the steam, the watervapor rapidly passes to the liquid state. As the air pressure outside the can is higher than the pressure inside, the can surface collapses.
Conclusions
The atmospheric air contains water vapor, oxygen, nitrogen, carbon dioxide and other gases, and their pressure is greater than the water vapor pressure inside the can.The steam condenses rapidly, comes to occupy a smaller space, so that the effect of the collapse is more intense.
Conclusions
Search for:Phase changes
of matter...
See the video of the experiment in our classroom !
Now, do the experiment in your school and send us
photos/videos.
center of high and low pressures
formation …
If you want to learn
more, search for…
…variations in atmospheric
pressure over the Earth's
atmosphere…
And most of all, have fun with science!