Below the surface
Water vapor (steam) is inside the bubbles that form inside boiling water. The bubbles that form prior to boiling are mostly dissolved gases escaping from the water.
It is the water vapor that is formed inside the bubbles. Water is lost in the air in the form of water vapor.
When water boils, the bubbles are made of water vapor. Water is changing from the liquid phase to the gas phase, but it doesn't change all at once, so you get bubbles of gas inside the liquid. The phase change will happen first at the location where heating is taking place, so if you have a pot on a stove, the bubbles will form at the bottom of the pot, and then rise to the top.
O2-Oxygen
When water boils the gasses which where absorbed are liberated and they expand as a result of the heat causing bubbles which then rise to the surface upon further heating it would be the water turning to steam that expands into bubbles, that is why the bubbles only form at the point of contact with the heat source. there could be some oxygen in the bubbles but it would be extremely small amounts as the heat does not split the bond between the oxygen and the hydrogen.
when any liquid BOILS the bubbles just contain the same substance, but just as a gas.now why did I put 'boils' in capitals?you know if you boil water there are tiny bubbles already forming before it is actually boiling. these are the gasses which were dissolved in the water.
hot air. ^^Close. It is actually steam or the gaseous form of H2O (water). As the water is heated it changes from a liquid to a gas. Since the heat is coming from the bottom (in a pot) and the top of the water is cooler, the gas forms bubbles.
Yes. When water boils, many bubbles appear. (212 degrees F)
it goes up in tempature, the water bubbles and evaporates. it goes up in tempature, the water bubbles and evaporates.
Dissolved air bubbles out of the water, as the boiling point of water is reached, water vapour starts to form inside the liquid in the form of bubbles
well it depends if you boil it over a fire sometimes bubbles do occur but if your just heating it at a temperature lower than boiling than it just slowly evaporates like regular water in a lake
it gets hot