When heating cold water, when the temperature has not yet reached the boiling point, the granddaught

Niece = Why, the landlord made a typo

The reason is this: when boiling water, the temperature of the water does not increase synchronously, and the water at the bottom near the heat source will absorb heat and reach the boiling point (start to bubble) first, but the water in the middle and upper layers does not reach the boiling point, so you will see such a phenomenon: there will be bubbles coming out of the bottom of the container, and the water as a whole has not yet boiled, that is, the so-called"Boiling water does not sound, ringing water does not boil".

In addition, gases partially dissolved in water will appear on the inner wall of the container at the beginning of heating.

I don't know what kind of bubbling the landlord is talking about?

This involves the solubility of water, nitrogen and oxygen in the air are more soluble in cold water, and when the temperature rises, the solubility of water decreases, and the excess air will be resolved, so there will be bubbles, the same reason you can observe carbonated drinks such as cola and beer, but the bubbles become carbon dioxide.

Granddaughter bubbling?

You boiled her?

Won't put. I think you mean that when you heat cold water, why do bubbles often bubble up when the temperature has not yet reached the boiling point?

It's funny. The granddaughter of the landlord actually contacted the boiling water.

Hah, I also felt a little strange that I came in to see what was going on.

It's a joke.

Hee-hee

1. The air dissolved in water turns into bubbles due to the increase in temperature and the decrease in solubility (due to the decrease in pressure, it becomes larger and larger).

2. Local overheating forms water vapor bubbles (smaller and smaller upwards due to the decrease in temperature).

When the temperature is low, the proportion of gases dissolved in water is high, and when the temperature is high, some gases escape from the water.

When the water is cold, there is a lot of air in the water, which is the air solubility. As the temperature rises, the air solubility decreases, and then you can see the bubbles Follow-up question: Why do the fish in the fish pond always swim close to the surface of the water when the weather is hot?

Remember to adopt it.

When cold water is heated, the temperature increases, and the solubility of the gas decreases, so bubbles often bubble out even if the boiling point has not yet been reached.

As the liquid heats up, the solubility of the gases dissolved in the liquid decreases, and it precipitates out of the water.

The gas in the water expands when heated and becomes a steam drum, most of which should be on the wall of the container.

When water boils, there are hot bubbles from below upwards, transferring heat

Of course, some other gases are dissolved in the water, such as oxygen and carbon dioxide, which will escape during the heating process, and it is these bubbles.

There are always some gases such as air dissolved in water, and when cold water is heated, the temperature increases, and the solubility of the gas decreases, so bubbles often bubble out even if the boiling point has not yet been reached.

Oxygen molecules, as the solubility of the gas decreases as the temperature increases.

Elite Changning Tianshan.