'100% moisture' means air has become water?

Does "humidity of 100%" mean that air will become water?

A child raises a question related to the term "air humidity" (or simply moisture ) that is often referred to in weather forecasts or applications for checking conditions. details. Moisture is usually expressed as a percentage (%) as shown below:

Humidity is often seen in weather forecasts.

For example, today's weather forecast in Ho Chi Minh City has a humidity of 76%, but what does that mean? If you are constantly interested in this, you will see the value of humidity sometimes reaches 100%. That means the air has become water and everyone is breathing . water into the lungs?

What is moisture?

Moisture, in simple words, the amount of water vapor in the air. Water vapor, as you know, is the gas state of water, so it is not visible to the naked eye.

Weather forecasters often use the words "absolute humidity" and "relative humidity" in newsletters.

According to How Stuff Works, you may have heard people say "It's not heat, it's moisture!" When describing discomfort in the city or environment. This means that there is a large amount of water in the air and causes more discomfort.

It should be noted that the term " moisture" is often distinguished into: absolute humidity, relative humidity and specific humidity. Weather forecasters often use the words "absolute humidity" and "relative humidity" in newsletters.

Moisture type

Absolute humidity is a measure of the total volume of water vapor in a given volume of air. Mathematically, the absolute moisture content (AH) can be calculated by dividing the air volume and steam mixture as the following formula:

However, the calculation of absolute humidity does not take into account the temperature of the system; This value is affected by changes in air temperature or pressure changes.

On the other hand, moisture content is the ratio of water mass to total mass of moist air. Often referred to as "moisture". So the type of moisture we are discussing here is "relative humidity".

Relative humidity

The specific moisture content is the ratio of water vapor to the total mass of moist air.

Relative humidity is the ratio of the current steam pressure of any gas mixture to steam compared to the saturated steam pressure in units of%. Another definition of relative humidity is the ratio of water mass to a current volume to that of the same volume of water when saturated steam.

So, if a weather report Think this way: if you have a half-full glass of water (50%). At this point, you can say that the cup contains 50% of the water that it can fill. The concept of relative humidity is also understood in this way.

"100% relative humidity"

The relative humidity is basically basically the degree of air saturation with water (because air can only carry a lot of water vapor at a certain temperature).

The relative humidity value is 100% meaning that air cannot add moisture anymore.

If the weather statistics show that the relative humidity value is 100% then that does not mean that the air has become water. Instead, it means that the air cannot add moisture anymore. Fog is a good way to imagine 100% relative humidity.

In other words, 100% relative humidity simply means that the air is currently holding the most water at a certain temperature. Think this way: a completely (100%) sponge saturated with water does not become water; Similarly, 100% relative humidity does not mean that the air has turned into water so "let your diving device at home".