When boiling water, why bubbles bubble in the water in the pot at first

That is the air dissolved in the water, when the bottom of the pot starts to heat, the heat is transferred into the water, the volume of the gas will increase, the water solubility will become worse, and the gas will come out. Then, because the density of those gases is relatively low, they will surface to form bubbles, which will eventually be released into the air.

Because the solubility of the gas dissolved in the water decreases due to the increase in temperature, the gas escapes and forms bubbles.

Those gases are air dissolved in water, and when the gas is heated, the volume will increase, the amount of water dissolved will become smaller, and the excess gas will be released. Then because they are lightweight to float, then they come to the surface to form bubbles, which are released in the air.

The gases that were originally dissolved in the water are discharged before boiling, and boiling is the violent vaporization of the surface and inside the liquid at the same time when it reaches its boiling point, so the bubbles that emerge from the bottom of the pot when the water boils are water vapor.

The density of the air is much lower than that of the water, so the water vapor at the bottom is buoyant enough to float to the surface of the water, so you can see the water bubbling constantly.

Effect: Boiling water is used as a method to make it drink by killing microorganisms that may be present. Different microorganisms vary in their sensitivity to heat, but many organisms are killed if water is kept at 70 °C (158 °F) for 10 minutes, but some are more heat-tolerant. Clostridial spores can withstand this**, but since the infection caused by this microorganism is not waterborne, this is not a problem.

Boiling is also used in cooking. Foods suitable for boiling include vegetables, starchy foods such as rice, noodles and potatoes, eggs, meats, sauces, soups and soups.

As a cooking method, it is simple and suitable for large-scale cooking. It is possible to cook meat or poultry for a long, slow time and produce nutritious ingredients. Disadvantages include the loss of water-soluble vitamins and minerals.

Commercially made foods are sometimes packaged in polyethylene bags as "boiled" products**.

A small amount of air is dissolved in the water, and air is also adsorbed in the small cavities on the surface of the container wall, and these small bubbles act as vaporizing nuclei. The solubility of water to air and the adsorption capacity of the wall to air decrease with the increase of temperature, and when the water is heated, bubbles are first formed on the wall of the heating surface.

After the bubble is generated, because the water continues to be heated, a superheated water layer is formed near the heating surface, and it will continue to evaporate water vapor into the small bubble, so that the pressure in the bubble (the sum of air pressure and vapor pressure) continues to increase, as a result, the volume of the bubble continues to expand, and the buoyancy of the bubble also increases, when the buoyancy of the bubble is greater than the adhesion between the bubble and the wall, the bubble leaves the wall and begins to float.

For some very attentive children, they are able to discover some strange phenomena in life at a young age. Then these strange phenomena, we can also use some science to inform them. So there are some children who will ask their parents when they are young, why they will bubble when the water is boiled, so today we are going to talk about this question.

Water reaches the boiling point first of all with a lot of people in their subconscious.

They will feel that the boiling water itself will bubble, so they will not think about why. In fact, when water is boiling, they produce bubbles, and these bubbles are mainly due to the violent vaporization of water, which increases the area of these organs. And the bubbles themselves only occupy a small part of the larger area, so they boil at the same time, that is, when the water reaches its boiling point, there will be a violent vaporization of their interior.

Then from some microscopic points of view it can also be seen that the liquid enters the inside of the water, due to someWater moleculesWith some energy, it will gradually vaporize.

The intermolecular forces then they can break free from the intermolecular forces between the water molecules, and at the same time make the spacing of some of the water molecules larger. In this case, water vapor can be formed.

And once I formed such a phenomenon, there would be an interface between companies. And this temperature is at the boiling point, so some of the water molecules at this interface can become gaseous.

The bubbles go up, so some people will find that when boiling water, their bubbles change from small to large, which means that when the bubble is big enough, they can get rid of an adhesion. Then they rise, and in the process of rising, they continue to get bigger, and you can see that when the water is boiled, some large bubbles appear on the surface of the water, and the circle of this bubble is also the surface tension.

Function. So when the water is boiling, we can see some bubbles on the liquid surface.

It is bubbling caused by the action of heat and air, and boiling water is very hot, so you should never drink it directly.

Because the boiling water is very hot, and there is a fire burning underneath, it will cause the water to bubble.

When the water is boiled, a certain amount of gas will be produced in the water, which will bubble, which is also a very normal situation.

Because when the water is boiled to 100, it will boil and bubble, which is very normal.

If you boil the water again, some bubbles will float upwards because of the heat, because the heating will produce a certain amount of gas.

Introduction: Water is something that people often drink, and it is important to pay attention to it when boiling water.

When many people are boiling water, they should never fill the kettle too full, and adjust it appropriately to make the kettle water reach a certain height. Some water will bubble after boiling, at this time we must pay attention, if the water has reached boiling, we must pay attention to change the state of the water. Water starts to have water vapor after it reaches a certain temperature.

If the water is bubbling, pour the water into the kettle in time, and don't let the water be heated in the kettle. If you use an electric kettle at home, you should pay attention to unplugging the power supply in time if the water is boiling, do not have dangerous behaviors.

Many people will have the phenomenon of drinking water in their lives, and we must pay attention to the correct method when drinking water, and we must choose a good kettle. If there are impurities in the kettle, you must pay attention to cleaning it at ordinary times, and some impurities in the kettle should be cleaned off, so that it will be healthier to use. Some people will have some bad situations in the use of kettles, and they should also adjust them in time.

If it suddenly trips when boiling water, you must see if the water is boiling when the water is boiling, you must see how long the water will take to boil, and you must turn off the power in time after arriving at the time, so as not to leak electricity. When boiling water, it is necessary to make the depth of the water shallow, so that it is not easy, and it is not easy to leak electricity when the water flows out. If the water is already boiling, you should see if you can pour the water into the kettle, take a rag and wrap it around the top of the kettle, and then pour it into the kettle.

This is because when the water boils, it compresses the air in the water and causes it to float continuously, and when it rises to the surface of the water, it will burst due to cold, and finally bubbles will appear.

It is because the water has reached a certain boiling point that this phenomenon of bubbling begins. It is also because the air pressure inside floats directly upward, so it bubbles.

When the water boils, the temperature of the bottom of the pot will be higher than the vaporization temperature of the water, and the water at the bottom of the pot will become water vapor, and the water vapor will float to the surface of the water, so it will bubble.

Because there will be some air in it, it will produce some small bubbles through this air.

When the water is boiling, a large number of bubbles emerge from the bottom of the pot. Everyone has heard that boiling water does not make a sound, and water does not boil. The fact is simple, when boiling water, the bubbles in the water are heated after expanding, the water around the bubbles evaporates into bubbles, the bubble volume increases, the buoyancy increases, and when the buoyancy is greater than the gravitational force, the bubbles rise.

But due to the low and high temperature of the water, the bubbles liquefy during the ascent and the bubble volume decreases. The bubbles grow and decrease, causing the water to vibrate and produce a loud "buzzing" sound. When the water boils, the temperature fluctuates and the bubbles rise, and the surrounding water vaporizes into water vapor, which makes the bubbles bigger and bigger, and when the surface bursts, water vapor will be released.

It can be seen that the bubbles produced when water boils are based on the original gas in the water, and gradually increase with the continuous evaporation of the surrounding water. During the boiling process, the gas in the water will definitely decrease, but there will also be gases dissolved into the water near the surface of the water. If we put the water in a transparent container and heat it to a boil, at first we will see small bubbles on the walls of the container and on the surface of the water.

When the water boils, we see a large number of bubbles rising from the bottom of the container. How are these bubbles formed? At room temperature, water can dissolve trace amounts of air.

When the pressure is constant, the solubility of dissolved air in water decreases with the increase of temperature. When water is put into the container, the surface of the container looks very smooth, but if you zoom in, you will find that there are many small holes in the surface of the container that can also store some air. When water is added to the container, air is squeezed into the wall.

As heating progresses, the volume of air expands, and the adhesion to the walls of the container decreases.

Therefore, as the temperature increases, the dissolved air in the water and the air absorbed by the walls of the container gradually separate, which is why some small bubbles appear on the walls of the container and on the surface of the water after heating. Under normal conditions, the bubbles in the first stage are mainly nitrogen, oxygen, carbon dioxide, and some argon.

This is because when the water boils, the water at the bottom of the pot will be vaporized. Some undissolved air is formed, and this air comes out.

This is due to the fact that during the boiling process of the water, the bubbles in the water will generate some air pressure, so they will start to emerge from the bottom up.

This is because when the water is boiling, the temperature actually starts from the bottom first, so bubbles will emerge from the bottom.

1. The water in the pot is bubbling does not necessarily pretend to be boiling;

2. If only the bottom layer begins to bubble up, it means that the hall rent or the top has not been completely boiled, and it must wait until a large number of small bubbles rise from the bottom of the pot and converge into large bubbles, which is called really boiling, and after the water is boiled, it must wait for it to boil for 2 minutes to kill the bacteria and microorganisms inside before drinking.

Boiling water boils the bubbles inside are oxygen, which has a scientific basis.

1.If the water is not boiling, most of the gases in the bubble are previously dissolved air. Since the solubility of most gases decreases with increasing temperature, as the solubility decreases, the dissolved oxygen and other gases in the water will saturate and precipitate.

As the water temperature gradually increases, most of the bubbles are water vapor. After reaching the boiling point, the liquid water absorbs the heat again and vaporizes. This year-old gasification is carried out not only on the surface, but also in the water.

The density of vaporized water is less than that of water, hence the formation of bubbles.

2.If you have already boiled the water, you will notice that as the water heats up, it forms a very small bubble that rises from the bottom to the top. At first, bubbles are few and far apart, but as the water gets hotter, more and more large bubbles begin to form.

The increase in heat further leads to larger bubbles, which usually form and rise to the top immediately. When the water starts boiling, escalating at 100 degrees Celsius, almost all the water molecules have enough kinetic energy to convert into the vapor stage, and the bubbles of the water vapor start to rise rapidly.

3.Technically, these bubbles are formed from celery round gases dissolved in solution, so if the water is in a different atmosphere, the bubbles will be made up of these gases. Normally, the first bubble is mainly oxygenated nitrogen and small amounts of argon and carbon dioxide.

As you continue to heat the water molecules, the molecules can transition from the liquid phase to the gas phase to get enough energy. Water vapor bubbles start at the nucleation site and are usually small bubbles made up of a mixture of air and water vapor.

4.Thermodynamics in physics has opposite characteristics. The more you know, the more mysterious it becomes, at least in the beginning.

This magical sensation began to focus on the process of boiling water, and then because of the suspicion, the physics behind it collapsed. It contains very little quantum content, and only a lot of unimaginable particles interact in an almost classical mechanical way. The above is the answer to the question of whether the bubbles in boiling water are oxygen or hydrogen, and what is the basis for this.