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One can calculate the absolute humidity (AH) from the relative humidity (r) using three equations: (1) the equation for mixing ratio, (2) an equation for relative humidity expressed in terms of mixing ratio, and (3) the Clausius-Clapeyron equation, which relates saturation vapor pressure to temperature.
The result of combining the three equations is:
AH = (1324 r/T) [exp {5417.75 (1/273 - 1/T)}]
where AH is expressed in grams per cubic meter, T is temperature in Kelvin, r is relative humidity (range is 0 to 1), and the relation holds true for T>273. For T<273, replace 5417.75 with 6139.81.
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∙ 12y ago
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The actual humidity divided by the saturation humidity is the?
relative humidity
What is the difference between relative humidity and actual humidity?
Humidity is the amount of water vapor at any given time and relative humidity is the amount of water vapor in the air compared to the greatest amount it can hold at that air temperature.
Why relative humidity does not give an accurate indication of the actual amount of water vapor in the air?
Because it is relative to temperature!
How do relative humidity and mixing ratio differ?
Relative humidity indicates how near the air is to saturation, while mixing ratio shows the actual quantity of water vapor in the air.
What is the relative humidity of air filled to half its capacity?
Relative humidity becomes the ratio between the actual amount of water vapor present to the capacity that the air has at a particular moment. Just to be an optimist, if the glass is half-filled, the relative humidity is 50 percent. If the glass is three-quarters filled, the relative humidity is 75 percent.
Which is the comparison of the amount of moisture in the air to the amount of moisture it can hold?
relative humidity
Why does relative humidity not give an accurate indication of the actual amount of water vapor in the air?
Because it is relative to temperature!
Which condition is the actual amount of water vapor in a mixture of air and water?
relative humidity
What is the formula to measure relative humidity?
HR= actual vapor pressure/ saturation vapor pressure
How do you calculate points on the new points plus?
measure relative humidity presure and new point
What does it mean when humidity is 100 percent?
This is called relative humidity. It is the ratio between the actual humidity, and the humidity for saturated air - that is, the maximum amount of water air can hold. This saturation point is dependent on temperature.
Amount of moisture in air compared to amount needed in saturation?
Relative humidity.
