When the water reaches 100 but stops heating, does it belong to boiling?

It doesn't belong. At a certain external pressure, boiling can only be carried out at a certain temperature (boiling point) and continuous heating.

Because boiling is an endothermic process that cannot be maintained without continuous heating, water can be at 100 at one atmosphere instead of boiling.

Even in that moment, it doesn't belong. See this sentence:

At a certain external pressure, boiling can only be carried out at a certain temperature (boiling point) and continuous heating. ”

In other words, although the boiling point of water is 100, it does not mean that it can boil at 100, it is only one of the conditions.

It is not in a boiling state. When the water reaches 100, it will boil if it continues to heat, and stop boiling when the water is stopped.

It doesn't belong. The condition for boiling is to reach the boiling point and continue to absorb heat.

Obviously, it doesn't boil without continuing to heat.

Uncertainly, there is also the factor of atmospheric pressure, one is the state at standard atmospheric pressure. And boiling is only a state that refers to a state, and a state is an observed phenomenon.

There are two necessary conditions for boiling, one is to reach the boiling point and the second is continuous endothermy.

It can only be said that it is boiling at 100 degrees Celsius, and it does not boil when the heating is stopped.

I don't know if what the landlord is talking about is 100 degrees under the standard atmospheric pressure, if it is not the standard atmospheric pressure, the water at 100 degrees is not boiling, or it does not reach 100 degrees.

Boiling is one of the ways of vaporization, and two conditions are required for boiling to occur: one is to reach the boiling point; The second is to continue to absorb heat. And both conditions are indispensable.

The boiling point of a liquid is related to pressure, and when the pressure increases, the boiling point increases; The pressure decreases and the boiling point decreases. The boiling point of water at 1 standard atmosphere is 100. The greater the air pressure in the pressure cooker, the higher the boiling point of the water, up to 125; The atmospheric pressure on the Tibetan Plateau is low, and the water boils at around 80.

The atmospheric pressure is variable, different places, the atmospheric pressure is different, even in the same place, the atmospheric pressure will be different, for example, the atmospheric pressure is higher on a sunny day than on a cloudy day, and the atmospheric pressure is higher in winter than in summer. Generally below the standard atmospheric pressure, but not too much, so the boiling point of water is slightly below 100.

Many bacteria in the water can be killed by 70, most bacteria by 100, but some bacteria by 120 are not killed. And the higher the temperature, the shorter the time to kill the bacteria. Purely from the point of view of killing bacteria, it should be that the higher the temperature, the better the effect, but the boiling point of the liquid is related to the air pressure, at a standard atmospheric pressure, the boiling point of water is 100, and the temperature of the liquid remains the same during the boiling process.

Therefore, to increase the boiling point of water, it is necessary to increase the pressure, such as using a pressure cooker.

In the past, there were no conditions, so the maximum boiling temperature of water could only reach the boiling point of water, and practice has also proved that it is safe to boil water for drinking. In addition, boiling water is a very obvious sign that it is easy to judge. Therefore, boiling is used as the standard for boiling water.

Similarly, eggs can be cooked at about 50 hours, and people also have to heat the water to a boil. But it doesn't have to be 100, as mentioned above, under a standard atmospheric pressure, the boiling point of water is 100, and the atmospheric pressure changes, so the boiling point of water also changes.

In general, the atmospheric pressure in the plains is below one standard atmosphere, and the boiling point of water is less than 100. If you don't believe it, you can use a thermometer to measure it when boiling water. In addition, the boiling water temperature of the water dispenser used in the family is generally about 85, the low is only 75, and the highest is 98, and many people are drinking, so the drinking water does not necessarily have to be heated to 100, and it is no problem to be a little lower.

Yes, the maximum temperature of water is 100 degrees Celsius, so as long as the water is heated to a very boiling temperature, it can reach 100 degrees.

Under normal circumstances, it is impossible to reach 100 degrees Celsius, because there are still many other factors that will generally lower the boiling point.

It can go up to 100 degrees, because water at 100 degrees is not necessarily able to boil, and it will only boil after reaching 110 degrees.

Of course, it can reach 100 degrees, and it is only higher than 100, and it cannot be lower than 100, because this is the boiling point of water.

There are two ways in which a substance changes from a liquid state to a gaseous state (i.e., vaporization) i.e., evaporation and boiling. At a certain pressure, the temperature corresponding to the saturated vapor pressure of a substance equal to this pressure is called the boiling point. The amount of liquid that is dispersed into the air by evaporation over a certain period of time is called evaporation.

This is due to the difference in the magnitude of cohesion between the molecules of the liquid. In addition, liquid evaporation not only absorbs heat but also cools the surrounding objects. Evaporation and boiling are different ways of vaporization, but from a phase transition perspective, there is no fundamental difference between them.

Regardless of evaporation or boiling, the liquid absorbs heat when it becomes a gas of the same temperature. Boiling is the vaporization of a liquid at a certain temperature (boiling point) and continuing to heat up. Evaporation is a slow vaporization that occurs only on the surface of a liquid; Boiling is a violent vaporization phenomenon that occurs simultaneously on the surface and inside the liquid.

When the temperature of the liquid rises to a certain level under a certain pressure, the phenomenon of rapid vaporization of the liquid surface and the inside of the liquid at the same time is called boiling. When boiling, a large number of bubbles emerge inside the liquid. At this time, the heat provided by the outside world is used to change the substance from a liquid state to a gaseous state, and the temperature of the liquid does not change, which is called the boiling point.

The boiling point is related to the properties of the liquid. At the same time, because when a liquid boils, the vapor pressure in the bubbles inside it must be at least equal to the ambient pressure before the bubbles can expand and rise, so the boiling point is also related to the ambient pressure. The relationship between boiling point and pressure can be derived from the Clausius-Clapperon equation.

For water, the boiling point rises by 1 K for every 3 6121 103 pa increase in ambient pressure. The boiling point at one atmosphere pressure is the normal boiling point.

Evaporation and boiling are different ways of vaporization, but from a phase transition perspective, there is no fundamental difference between them. Regardless of evaporation or boiling, the liquid absorbs heat when it becomes a gas of the same temperature. The heat absorbed by a unit mass of liquid into a gas of the same temperature is called the heat of vaporization.

If the water is boiled and heated, the temperature of the water will not change. However, if the heating is stopped, the temperature of the water will gradually decrease.

This is actually a very simple physics knowledge. Because the boiling point of water is actually 100 degrees. In other words, when the temperature reaches 100 degrees Celsius, the temperature of the water will not change.

At this time, the maximum temperature of the water is 100 degrees Celsius, and there is no difference. Even if you put more fire underneath, even if the water temperature has been increasing, even if the water has disappeared, then the water temperature is still 100 degrees without any difference.

Therefore, if the water continues to be heated after boiling, the temperature of the water will not change in any way, because it has reached the highest temperature, so there can be no difference, and there can be no change, and the temperature has become the top.

But when the water temperature stops heating, some changes will occur, because the highest boiling point needs to be maintained by a higher external energy, and if you don't have this kind of fuel and energy from the outside world, the temperature will slowly decrease.

So when the outside world stops heating, its temperature will continue to decrease. So if you stop heating, it will slowly decrease in temperature, but when it reaches a certain point, it will slow down more and more slowly.

Therefore, if you cool down as a whole, it is a question of the specific heat capacity of water. Because the specific heat capacity of water is still very large, it can put a lot of this temperature, so even when it heats up and cools down, it is relatively slow and not so fast.

Therefore, regardless of heating or cooling, you can use this property of water, so this water is also a better conductor of this kind.

So this is a very simple knowledge, one is about the boiling point of water, and the other is about the specific heat capacity of water, so the temperature of the water continues to heat when the water is boiling, and the temperature of the water will gradually decrease when the flood stops heating.

And you can do this experiment at home. Take a thermometer with a higher temperature and test it while heating a kettle all the time.

Take out the kettle when it is not heated below, and measure how high the temperature in the water is every 30 seconds or a minute, so that you know how the temperature of the water will change, in fact, all the physical knowledge or a lot of chemical knowledge is in our lives, as long as you look for it yourself, there will be many answers.

After the water boils, continue to heat it, the temperature of the water will not change during the boiling process, the heat obtained by the water directly makes who becomes gaseous, when the heating is stopped, because its boiling point temperature is higher than the environmental dimension, and can not be supplemented by heat, so the temperature will gradually drop due to the gradual loss of heat. The evaporation rate gradually decreases.

Boiling means that the water is vaporizing, and vaporization needs to absorb heat, and if it boils all the time, it will always vaporize and absorb heat.

From a microscopic point of view, when boiling, the inside and surface of the water undergo intense vaporization at the same time, and all the heat absorbed is used to increase the potential energy of the molecule (without increasing the kinetic energy of the molecule), so that the water changes from liquid to gaseous, and the kinetic energy of the molecule does not increase, so the temperature remains unchanged.

First of all, it needs to be clear that the condition for water to boil is that the temperature of the water continues to absorb heat after reaching the boiling point. In general, after heating water to the boiling point, the water near the heating source is heated above the boiling point and becomes gaseous, and the water vapor density is small so that it rises, and at the same time, heat conduction is carried out to the surrounding water. This caused the phenomenon of boiling.

In the pressure cooker, due to the high-pressure environment, the boiling point of water can reach more than 100, at this time, if the pressure is removed and the lid is uncovered, because the temperature of the water is still more than 100, and the surface water due to the cooling of the air and the temperature difference between the lower water, it will produce heat conduction, which is equivalent to the surface water is still at the boiling point and is heated by the lower water, so the water will still boil at this time. The subject's question should be that if the boiling water is immediately removed from the heating source, the instantaneous temperature should still be at the boiling point, so it should continue to boil, right? In fact, there will still be high-temperature water vapor in the water at this time, which will heat the surrounding water, so the water will still boil for a short time after removing the heating source.

Seeing that some of them are explained by the thermal motion of molecules, the essence of temperature is to measure the intensity of the thermal motion of molecules, and one of the phenomena of thermal motion of molecules is pressure.

After the water boils, as long as the pressure does not change, its temperature does not change, and the heated heat is used to change the state of the water. When the heating is stopped, there is a loss of energy due to the transfer of heat to the surroundings, which lowers its temperature.

The factors that affect internal energy are: temperature, mass, state of matter!

After the water boils, it continues to be heated, (absorbing heat, increasing internal energy) and increasing internal energy.

The temperature and mass do not change, and the state of matter changes (liquid water --- gaseous water vapor).

The heat will be transferred, if the temperature reaches the experimental temperature and immediately remove the alcohol lamp, the asbestos net will still heat the beaker, so the water will not stop boiling immediately, the temperature will continue to rise, and the experiment is not to let the water heat up at one time but to carry out the experiment controllably, first control it to a few degrees, as experiment 1 and then raise the temperature for experiment 2 and so on.

Good luck with your experiment

The water does not boil after 100 degrees, and the water does not freeze after 0 degrees, the two are related, and they are the same reason (not related to air pressure).I'm talking about pure water, not an aqueous solution.

Boiling is when the bubbles in the liquid gradually grow larger and then float upward. Crystallization is when the small crystals in the liquid gradually grow larger and then sink. Regardless of the ups and downs, the common denominator between the two is "gradually getting bigger", which is what physics calls "nodules" (which is the scope of the university).

Strictly speaking, water does not boil at 100 degrees because there is no driving force for boiling. It takes more than 100 degrees for the prime mover to boil, and as soon as it boils, it absorbs heat, so boiling water is "approximately" 100 degrees. The problem is that for water to boil, bubbles must be noduled, and for nodules it needs "nodule spots", and the best nodule points are rough solid surfaces.

If you heat the water with a glass with a smooth inner wall, since there are no nodule points, the water will not boil even if it has the driving force to boil (more than 100 degrees), and the temperature will continue to rise. Water in this state is extremely unstable. If you gently shake the cup, or throw something into it, the water is stirred inside, once the water molecules find a suitable binding point, the whole cup of water will immediately boil, and if it is violent, it is equivalent to **, which is extremely dangerous.

The water at zero degrees does not freeze, also because there is no tuberculosis in the town. If you throw a solid into it, the whole liquid will immediately turn into ice, and it will also crush the container (ice expand), which is also very dangerous.

Therefore, when the general scientific and technological personnel do experiments with changes in the state of matter, they generally do not use the "very" smooth hall photographer. If you want to use it, you will also throw a small stone-like thing inside, just to prevent it.