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Boiling Water
Part 1 of Paper
....and air to cool down, the air will cool and contract, lowering the pressure in the tin. If it lowers enough, the partial vacuum will collapse the walls of the can! The boiling point definitely reduces with air pressure. There is a famous demonstration where or coffee is drunk, the trick is it was in a vacuum chamber.... Part 2 of Paper
....rm. This is some air that is dissolved in the cold water and is being expelled by the heating. This is not boiling. As the water nears the boiling point, some areas of the container close to the heat source may be hot enough to cause some boiling in that area which produces some local bubbles. To be sure that all of the water is "at the boiling point," you should wait until there is a large amount of bubbles rising to the surface. The bubbles in are made of, air and/or water vapor, dependi.... |
| Number of words: 340 - Approximate pages: 2 |
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