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Concept explainers
Interpretation :
This is to be explained how two different water vapor densities are at 100 % humidity.
Concept Introduction :
Saturation of air with water vapor depends on temperature. Relative humidity is the ratio of amount of water vapor to the amount of water vapor required for saturation.
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Answer to Problem 8E
Due to different temperature, two different water vapor densities can have 100 % humidity.
Explanation of Solution
With the increase of temperature, amount of water vapor required to saturate certain volume of air increases. So, if the temperature is high for a day, more amount of water vapor is required as compared to a day on which temperature is less. Thus, it is possible that on one day, 100 % humidity corresponds to 1.9 moles of water vapor per 1000 L of air and on another day, 100 % humidity corresponds to 1.0 mole of water vapor per 1000 L of air.
Two different days might have different temperatures. So, two water vapor densities can have 100 % humidity.
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Living By Chemistry: First Edition Textbook
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