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The coolest part of the water is on the top of the pot. That's where the water is touching the air. Then obviously the hottest part is at the bottom where the water is closest to the heat source. Since heat makes water evaporate into its gas form, the bubbles are from the heated gaseous water from the bottom, making its way to the top, and out of the pot. If you were able to heat water evenly, or if you could have the heat source coming from above, there would be no bubbles. It would just slowly evaporate from the top as it reaches the right temperature.
Wiki User
∙ 9y ago
Wiki User
∙ 11y agoMolecular activity called kinetic energy causes molecules nearest the heat source to move rapidly which creates "bubbles" as the molecules "expand" into a gaseous state.
Addendum.. The molecules of air or oxygen naturally present in water are also responsible to form the bubbles.
Wiki User
∙ 14y agoWhen water boils, it is heating up.
The water heats up and will eventually be evaporated (the steam from the water).
The bubbles are caused by air floating to the surface and taking the form of a bubble. Then it pops and goes into the air.
Wiki User
∙ 13y agoThe bubbles are also water in the most real physical sense. They are water vapor. They do not come from nowhere, but from the liquid water itself.
The most familiar states of matter are solid, liquid, and gas (or, in this case, vapor.) When you begin to boil a pot of water, you begin with water in its liquid state. Let's say you start on your stove top with water at 20 OC.
As the heat energy from your stove is added to the water, its temperature rises. The water temperature rises until it reaches 100 OC, but then the thermometer stops rising, even though you are still adding heat energy. How can this be?
The extra energy you are adding does not raise the temperature of the water above 100 C (or 212 OF). What is does cause is to change the state of the water from the liquid form to vapor.
This is the "nowhere" where energy seems to hide.
In physics, it is called the latent heat of vaporization.
It is called "latent" because the thermometer does not detect it. When your water is boiling at Standard Temperature and Pressure, it does not get hotter. It just starts vaporizing away.
Wiki User
∙ 14y agobecause whenever liquid gets to a certain temperature, it boils, and boiling means to bubble very hotly.
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Why does water boil when the vapor pressure is equal to atmospheric pressure?
Because while atmospheric pressure is the greater of the two the vapour pressure of the water can not spontaneously form bubbles (ie boil).
When you boil water how does the air get under the water?
The bubbles aren't really "air", but steam. When water reaches 100 degrees centigrade it turns into steam, and it's that steam that create the bubbles you see appearing and rising from the bottom of a pan.
Why when you drop an egg on hot water bubbles rise?
When water is near the boiling point, there are micro-bubbles in the water, where the vapour pressure is equal to the surrounding water pressure plus the micro-bubble surface tension. This process is known as superheating. When an egg, or other object, is dropped into the superheated water, the surface tension is broken, and several micro-bubbles join together to form a single bubble visible to the naked eye. This process then is self-agitating, and creates more bubbles. This is the reason you should never boil water in the microwave, as it can instantaneously boil over and scald you.
When CCl4 boils what is inside the bubbles?
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.
What does bring to a second boil mean?
It's a good boil with medium sized bubbles breaking frequently, but not yet a constant, rolling boil.
Why does sparkling water boil faster than water?
there are already bubbles in it
What would happen if you boil aspirin?
the will be bubbles
What are those bubbles in boiling water could they be water gas what will happen eventually if you continue to boil the water?
What are the bubbles in boiling water? They are gaseous water and air. what will happen if you continue to boil the water? The water will evaporate, and fairly quickly.
What is the meaning of rolling boiling in cooking?
It refers to a boil. When water is boiling, a rolling boil is when you are stirring the water and it is still boiling.
The bubble coming out of the breaker.what is the name of gas?
When you first start to boil water, the bubbles that you see are basically air bubbles. Technically, these are bubbles formed from the dissolved gases that come out of the solution, so if the water is in a different atmosphere, the bubbles would consist of those gases. Under normal conditions, the first bubbles are mostly nitrogen with oxygen and a bit of argon and carbon dioxide. As you continue heating the water, the molecules gain enough energy to transition from the liquid phase to the gaseous phase. These bubbles are water vapor. When you see water at a "rolling boil," the bubbles are entirely water vapor. Water vapor bubbles start to form on nucleation sites, which are often tiny air bubbles, so as water starts to boil, the bubbles consist of a mixture of air and water vapor.
What is inside the bubbles of boil water Where they come from?
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
Does hot tub water boil?
If you heat it enough it will. However, in normal operation, a hot tub does not actually boil water; the bubbles are mainly air.
How do you identify a boil?
It bubbles
If water is boiled will it turn into water vapor or steam?
When you boil water, a lot of air-bubbles appears on the surface. it is the water turning into steam.
Why does water boil when the vapor pressure is equal to atmospheric pressure?
Because while atmospheric pressure is the greater of the two the vapour pressure of the water can not spontaneously form bubbles (ie boil).
When you boil water how does the air get under the water?
The bubbles aren't really "air", but steam. When water reaches 100 degrees centigrade it turns into steam, and it's that steam that create the bubbles you see appearing and rising from the bottom of a pan.
How do you get bubbles out of ice cubes?
Boil it first
