No values were quoted for the vapour pressure at any temperature, but the authors stated the boiling point of tritiated water was less than that of ordinary water. The work reported here is the ...

so as water vapor increases, the density of air decreases. Temperature also changes the density of air. As air gets warmer it expands and becomes less dense, causing atmospheric pressure to fall.

More information: Jai-Yeop Lee, Derivation of full range vapor pressure equation from an arbitrary point, Chemical Engineering Communications (2024). DOI: 10.1080/00986445.2024.2409171 ...