Weight of 1 m3 of humid air as compared to 1 m3 of dry air, under the same conditions, is
A. Less
B. More
C. Same
D. Unpredictable
Answer: Option A
This Question Belongs to Chemical Engineering >> Mass Transfer
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A. No change in theoretical
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C. Major decrease in the number of
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The more water vapor in the air, the smaller its molecular weight will be.
“Dry” air contains no water vapor, and is mostly a mixture of molecular nitrogen (N2) and molecular oxygen (O2). The molecular weight of dry air is 28.97 grams per mole.
Since mole per mole, dry air is heavier than water vapor, any mixture of dry air with water vapor will weigh less than pure dry air
Why ? humid air is less than dry air, under the same conditions by weight