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What is the volume fraction of water vapor in the air?

2010-03-30View Original

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Ask a question: What is the general volume fraction of water vapor in the air? Assume that the temperature is 20°C and it is raining. Can you think that the partial pressure of water vapor in the air at this time is the saturated vapor pressure of water at that temperature? Thanks!
Reply #22010-08-06
The relative humidity is generally given as a weight percentage. The molecular weight of water is smaller than the average molecular weight of air, so the volume percentage is larger. The second question, I think it should be close, because the air moisture is close to saturation.

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Translated at 2026-07-27 05:51:52

Original: https://bbs.hcbbs.com/thread-641490-1-1.html

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