When boiling water, there is no white gas at the place closest to the spout

When boiling water, there are two possibilities that there will be no white gas at the nearest point to the spout! One is that boiling water liquefies when it encounters air that is cooler than its own temperature and turns into water droplets, which you can't easily see! There is also a possibility that when boiling water, it is easy to burn because there is no moisture of water near the spout, and it is not easy to detect the gas when the water encounters something higher than its own temperature!

When the water is boiled, the water at 100 degrees Celsius will turn into water vapor and come out due to the low temperature of the air.

The water vapor will liquefy again into small droplets.

So what we see as "white gas" is just a small droplet of water after liquefaction, and the real water vapor is invisible.

This is the real reason why there is no white gas in the place closest to the spout.

When water reaches a certain temperature, it boils (called boiling point).

In other words, the water in the teapot boils, (the water turns into water vapor when exposed to high temperatures, and I think you know that).

When the water reaches the mouth of the teapot, you can't see the white gas, in fact, it is the intermediate process of the transformation of water vapor into small water droplets, "water vapor becomes small water droplets when it is cold" (in fact, you can see the air flow of water under the sun), and the white vapor you see outside the teapot is the effect of the moment when the water vapor changes into small water droplets

That's because there is gaseous water coming out close to the spout, and gaseous water is invisible to the naked eye. And those who can see it"White gas"It is the gaseous water that is liquefied when it is cold, and it becomes a small liquid droplet, so it can be seen.

Because it solidified into small droplets.

The cause of white gas is the formation of small water droplets due to the liquefaction of water vapor when it is cold.

But in fact, whether it is boiling water or the formation of car exhaust in winter, there is a distance from the spout. This is because when heating, the metal pot has a heat conduction function, and the air around the spout, as well as the spout, are hot and almost at the same temperature as the water vapor, so the water vapor is not cold in this range, and it will not liquefy into small water droplets, and there is no white gas in the acacia. In the slightly farther places, the air is cold, and there is a large temperature difference between the high temperature water vapor, so the water vapor will form small water droplets when it is cold.

Because, in winter, the ambient temperature is low, so the phenomenon is obvious. It's like the exhaust gas in winter, and when you breathe in winter, it doesn't form white gas in your mouth.

The white gas that comes out of the spout and other places when boiling water is small droplets.

Water vapor is not visible, these so-called "white gas" are small water droplets, the surrounding air encounters ice cream, the temperature immediately decreases, and liquefied into small water droplets; The "white gas" of hot soup is formed by the liquefaction of hot water vapor when it meets the air. So these two kinds of "white gas" are the same principle. The difference is in the temperature.

The white gas that comes out of the spout and other places when boiling water is small droplets.

Water vapor is not visible, these so-called "white gases" are small water droplets, the surrounding air encounters ice cream, the temperature immediately drops, liquefied into small water droplets; The "white gas" of hot soup is formed by the liquefaction of hot water vapor when it meets the air. So these two kinds of "white gas" are the same principle. The difference is in the temperature.

Of course not, keep in mind that water vapor is a gas, invisible to the naked eye, and whatever can be seen is certainly not water vapor. When boiling water, the temperature is high, water vapor is generated, and after volatilization, it encounters low temperature air and condenses into fine water droplets, which is the "white gas" we see, so "white gas" is also liquid water, but the water droplets are small and look like gas. In the same way, when the weather is cold in winter, the white breath exhaled from our mouth is also the condensed water vapor in our body.

Water vapor is not visible, these so-called "white gases" are small water droplets, the surrounding air encounters ice cream, the temperature immediately drops, liquefied into small water droplets; The "white gas" of hot soup is formed by the liquefaction of hot water vapor when it meets the air. So these two kinds of "white gas" are the same principle. The difference is in the temperature.

No. Strictly speaking, these white gases are liquids. After the water reaches the boiling point, it vaporizes into water vapor (colorless and transparent), and the water vapor liquefies into small water droplets when cold, which is the so-called "white gas".

It is water vapor, with the increase of boiling water temperature, the water content of the convection gas from the kettle gradually increases, and when it comes into contact with the lower ambient temperature outside the kettle, the water vapor in the temperature drops and condenses into tiny water droplets, which is the white gas seen.

Of course it is, unless your kettle has something else attached to it.

Water vapor is invisible and is a gas, and white gas is a liquid.

Yes, water evaporates when heated. A large amount of water vapor is formed.

1) When boiling water, "white gas" comes out of the spout, which is the water vapor with a high temperature coming out of the spout.

When encountering small water droplets condensed by the cooler air around the spout, it is a liquefaction phenomenon; (2) When the water is boiling, it continuously absorbs heat and the temperature remains unchanged; (3) In the hot summer, people will feel cool when blowing the fan, because the flow of air accelerates the evaporation of sweat, evaporation and heat absorption, but the temperature of the air does not decrease; (4) In the cold winter, the frozen clothes hanging outdoors will also become dry, and the ice will directly change from solid to gaseous, which is a sublimation phenomenon, so the answer is: liquefaction; No change; No change; Sublimation

This so-called "white gas" is the process of liquefaction of water vapor.

Water vapor is colorless and transparent.

The water vapor coming out of the spout is colorless because the temperature is 100 degrees Celsius at the beginning.

Gradually, the water vapor comes into contact with the air, cools and liquefies, forming small water droplets that turn white.

Therefore, when the water in the kettle is boiling, the "white gas" is not visible in the section near the spout, but it can be seen in the upper section.

The water vapor is colorless, and the water vapor that has just been vaporized near the spout is at a temperature of 100 degrees Celsius, so it is not visible.

However, as the water vapor leaves the spout, the temperature decreases, and the water vapor liquefies, turning into small droplets, which are mist, and cannot allow light to pass through completely, so they are white.

In fact, the white gas we see is that the water vapor solidifies into small particles in the air, so it is visible, but near the spout it is not visible because it is not cooled - it is still gaseous.

The white gas seen when boiling water is formed by the liquefaction of the water vapor coming out of the kettle when it is cold, the temperature at the spout is relatively high, and the water vapor coming out of the kettle cannot be liquefied, and the air temperature is relatively low in the far away of the spout, and the water vapor coming out of the kettle liquefies into small water droplets when it is liquefied by the cold air

Therefore, choose B