2006-09-25 02:05:32 · 5 answers · asked by jpc 1 in Science & Mathematics ➔ Other - Science
The bubbles are simply water in its gaseous form as water vapor. Because the heat is supplied to the metal at the bottom of the pot, the water boils (or vaporizes) first at the bottom of the container. The water there changes to water vapor and is suddenly less dense than the surrounding fluid, causing it to float in the liquid water. This stage of boiling is called "nucleate boiling," because it occurs at discrete nucleation points on the hot surface. Eventually, the boiling mechanism transitions. When the entire pot of water is roiling with turbulence and throwing off billowing steam, that's called "film boiling" and it's happening all throughout the liquid.
2006-09-25 02:10:05 · answer #1 · answered by DavidK93 7 · 4⤊ 0⤋
Those bubbles rising when water is heated is actually the dissolved gases in water that escape. You must be knowing that water, at room temperature, dissolves a good number of gases like Carbon-dioxide, Oxygen and other such gaseous compounds.
The solubility of such dissolved gases decreases with an increase in the temperature. (This also explains why 'cold' drinks dissolve more CO2, of course under pressure, and thus have the 'fizz' associated with them)
As water is boiled, the rise in temperature lowers the solubility of the dissolved gases causing them to escape as "bubbles". That's it....hope you find that explanatory enough.
2006-09-25 09:48:20 · answer #2 · answered by ravestar 2 · 0⤊ 1⤋
A bubbling in a liquid show that a gas is being released. Since the only substance in water is H2O, that must be the gas. Liquid water is being turned into water vapor.
2006-09-25 09:11:02 · answer #3 · answered by Greg G 5 · 0⤊ 0⤋
I think the water gets so hot that the bubbles are steam bubbles?
2006-09-25 09:14:37 · answer #4 · answered by buffywalnuts 4 · 0⤊ 0⤋
its just a state change
2006-09-25 09:13:32 · answer #5 · answered by tylermyhre 2 · 1⤊ 0⤋