Jul
6
Why does the rate of boiling in a pot of water change between open air and being covered?
July 6th, 2010 posted by
admin
Longer version:
Take a pot of water that has been boiling slowly on the
stove for a minute or longer and place a tight fitting cover on it and leave it there for at least 30 seconds. Then remove the cover and observe the rate of boiling.
1. Has the rate of boiling increased or decreased?
2. Why do you think the rate of boiling changed?
ALSO:
ranjon333 says:
July 7th, 2010 at 9:51 pm
when you cover it the heat is being trapped and therefore makes it heat up faster
ÐIESEŁ ÐUB says:
July 11th, 2010 at 7:45 am
The temperature of the air causes the water to cool when it is uncovered. Much like no longer being under the covers in bed. When it is uncovered you lose the stored energy in the water as the cold air slows the water which cools it.
To relate to global warming…we are losing our blanket “ozone” and it is causing the opposite effect. Instead of blocking heat it is allowing it in.