the point where boiling starts.
What do we do?
We will use a paper cup or a balloon piñata to heat water without these
harm comes containers!
Candle or a lighter
metal support
metal ring
Paper cups or rubber balloons
Select a paper cup or a balloon piñata
Place the paper cup into a hoop attached to a support
Adds water to the glass or fill the balloon with water and tie it to the hoop or a clamp
Gently heated the glass with its contents using a candle or a lighter
with the appropriate calls and taking care not to burn
Continue heating. Can you make the water ebulla?
Remove the heat source and allow the water to cool
rises above the water temperature.
Water is a liquid with a great capacity to absorb heat itself before
heated, thanks to the structure and arrangement of its molecules. It is known that
Water molecules in the solid and liquid states are connected by links 21
hydrogen and therefore large quantity of caloric energy is expended in such break
links; addition, the ignition point of the rubber is much lower than the point of
boiling water and burn before it reaches the water to boil.
It should be noted that the flame should not be too much for the Heat have the time
enough to be absorbed by the system without exceeding the boiling point
water.
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To think ...
Why water is the ideal liquid to put out fires?
If water is heated in a glass beaker, why glass gets hotter
the water while the paper?
that good activity to work with kids in 4th year, I when hydrogen bonds work and I began to introduce other behavior of other substances and the behavior of water and there to guide them to conclude that between water molecules must be interactions ... was very interesting
ResponderEliminarGood to Lore, the truth that if it's super interesting to other students like much more and is more dynamic
ResponderEliminar