Why is it difficult to include water vapor in a graph that shows the percentages of various gases in the atmosphere?

1 Answer
anor277
Nov 6, 2016

Quite probably because the percentage of water in the atmosphere is a function of temperature.

Explanation:

Given a temperature, the water vapour content of the atmosphere is known. These are extensively tabulated. When a gas is collected by bubbling thru water and displacing a volume of water in say a graduated cylinder, the saturated water vapour pressure must always be used to make a correction.

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