why are bubbles formed when water is boiling and what are the bubbles composed of . A scientific answer is expected.
2007-03-22 07:09:58 · 6 answers · asked by Nahush P 1 in Science & Mathematics ➔ Chemistry
The bubbles are the gaseous state of H20. When water (liquid H20) is heated, this imparts randomised kinetic energy into the water molecules. They begin moving more erratically, and the average distance between them increases as they bounce off each other, causing the water as a whole to expand slightly. Then at a critical temperature (the boiling point of water), parts of the water undergo a `phase transition': the H2O molecules sepaerate completely away from each other, causing patches of extremely low density water to form, these are the bubbles. Because they are of lower density they rise to the surface and emerge as the gasesous form of H2O.
Gaseous water is actually invisible to the naked eye. The steam we see is actually this gas cooling in the air, below the boling point, and forming back into water as tiny floating droplepts of liquid again.
2007-03-22 07:25:21 · answer #1 · answered by Adam B 2 · 0⤊ 0⤋
The bubbles are from the gas form of water seeping out of the liquid. Because of the hydrogen bonding (hydrostatic forces) a thin layer of water is lifted up by the force created by the steam and hence you see the bubble as a thin layer of liquid engulfing air(H20 vapor in this case).
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2007-03-22 14:18:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋
May not be scientific enough.
But the bubbles are caused by the water (liquid) transforming into a gas (steam) and the different densities of those to forms of H20.
2007-03-22 14:16:12 · answer #3 · answered by texaskelt 5 · 0⤊ 0⤋
it is water vapor, when water is heated the molecules expand from each other until the liquid turns into a gas. when that happens it makes gas pockets in the liquid. the gas pockets are the bubbles. there are different kinds of molecules and chemicals in the water so it may be different things but for the most part it is H2O in gas form. they are lighter than the liquid so they float to the top.
2007-03-22 14:18:32 · answer #4 · answered by cwfraggle 3 · 0⤊ 0⤋
Bubbles are the gaseous H2O escaping from the liquid H2O. Ever heard the term "air-bubble." That's all it is.
2007-03-22 14:17:35 · answer #5 · answered by BabeeOreo 3 · 0⤊ 0⤋
http://en.wikipedia.org/wiki/Boiling
Check this out .. you will find the answer..
Hope it is the best..
2007-03-22 14:25:36 · answer #6 · answered by Lans 3 · 0⤊ 1⤋