What happens when air reaches 100 relative humidity?

When relative humidity reaches 100 percent or is saturated, moisture will condense, meaning the water vapor changes to liquid vapor. Dew Point is the temperature at which air reaches 100 percent relative humidity. If the air is cooled below dew point, moisture in the air condenses.

What is the relative humidity when water condenses?

100 percent
The relative humidity is 100 percent when the dew point and the temperature are the same. If the temperature drops any further, condensation will result, and liquid water will begin to form.

Can relative humidity be greater than 100\%?

Surprisingly, yes, the condition is known as supersaturation. At any given temperature and air pressure, a specific maximum amount of water vapor in the air will produce a relative humidity (RH) of 100 percent. Supersaturated air literally contains more water vapor than is needed to cause saturation.

When the relative humidity is less than 100\% What is the lowest temperature?

For a parcel of air that is less than saturated (i.e., air with less than 100 percent relative humidity), the wet-bulb temperature is lower than the dry-bulb temperature, but higher than the dew point temperature.

What are some factors that affect the relative humidity of the air?

Humidity depends on the temperature and pressure of the system of interest. The same amount of water vapor results in higher humidity in cool air than warm air. A related parameter is the dew point. The amount of water vapor needed to achieve saturation increases as the temperature increases.

How does relative humidity affect condensation?

At a specific amount of moisture in the air, the relative humidity will rise as air temperature falls. Condensation can be expected to form on windows, doors and skylights given the right conditions. The higher the relative humidity, the warmer a surface temperature needs to be in order to avoid condensation.

How does relative humidity affect the rate of evaporation?

Humidity, or water vapor content of the air, also has an effect on evaporation. The lower the relative humidity, the drier the air, and the higher the evaporation rate. The more humid the air, the closer the air is to saturation, and less evaporation can occur.

What causes relative humidity changes?

Relative humidity changes when temperatures change. Because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air.