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Bubbles are basically due to the dissolved air in the water.so when we boil the water,the air gets hotter & comes up in the form of bubbles.
ans2. Nice answer above, but wrong. Sorry.
Even previously boiled water will have bubbles near the heat source.
The bubbles are a few molecules of water, instantaneously (or nearly so) expanding into steam.
Steam occupies about 1600 times the volume of the original water - the molecule! [In an ambient atmosphere at stp. i.e. your kettle. (stp = standard temperature and pressure)]
So this expansion is very rapid, and according to the "equal reaction" phrase, an equal force is generated on the vessel as is exerted on the water around.
The actual expansion point seems to occur at a minor imperfection on the surface of the boiling vessel. Hence our use of bumping devices added to flasks when we are boiling chemicals - we deliberately supply discontinuities.
The same effect may be seen in a glass of soda or of sparkling wine. The dissolved bubbles will only exolve from a particular point. In this case there is not an explosive expansion.
What else can I help you with?
Composition of a water bubble in boiling water?
A water bubble in boiling water is composed of water vapor, which is the gaseous form of water. The bubble forms when water reaches its boiling point and the water molecules evaporate into gas, creating a pocket of vapor within the liquid water.
Does boiling water bubble faster than simmering water?
Yes!
How bubble form in boiling water?
It is an event called vaporization.
What baking equipment can tell when water is boiling?
lol wow you dont need a piece of equipment to tell when water is boiling... you just watch the water as it heats up and when it starts to bubble its boiling... Ta -dah!
What is boiling in food tech?
getting a saucepan, putting water in, letting it heat up on a turned on hob, wait for it to bubble and then add what your boiling. that's called boiling,
Why the process of boiling water is noisey?
At the minute site of the formation of a bubble of boiling, we have some water turning instantaneously to steam. This has a much larger volume than water, and expands VERY rapidly. In this expansion, it forces some water away to make space for the bubble, and it is these forces of expansion, and the reaction to them, that causes the noise.
How can you get water to boil below 100 degrees?
the boiling of water is depends upon the outer pressure which acting on it, when water starts to boiling, that time bubble(water vapour) is produced and due to density differents it's goes upward. but when the pressure will decreases, that time it's easy to bubble to go upward direction, and its boils at a low temperature(below 100*c). and when the pressure increases that time the bubble need more force to go upward. so............................
Why does boiling oil bubble?
Hmmm, I have never seen or heard of hot oil boiling.
Why does the water bubble up then stop then it starts again just by adding salt?
When you add the salt it increases the boiling point of the water, so bubbling stops until this new solution reaches its boiling point. Adding salt, sugar, or any solute to water raises the boiling point and lowers the freezing point of water.
How you can find boiling point of liquid?
at which temprature first bubble form of liquid its called boiling point.
When is the best time to put salt and meat to the water before boiling or when it is boiling?
It's best to put it in RIGHT BEFORE it's boiling. Time it out right so that when the water is just beginning to bubble, drop it in.
What is the boiling of the substance and what is the melting point?
Melting point is when ice (solid), for example at room temperature, turns into water (liquid). Boiling point is when the melted water is heated until it boils and starts to bubble and give off steam - getting hot enough to scald.
