Question

how does water vapour affect air pressure? ​

Answer 1

Answer:

Since water vapor is less dense than dry air if both have the same temperature, the addition of water vapor decreases the overall density of the air and lowers its pressure

Explanation:

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Answer 2

Answer:

Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere. Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation.

Solid state: Ice

Boiling point: 99.98 °C (373.13 K)

Heat of vaporization: 2.27 MJ/kg

Specific gas constant: 461.5 J/(kg·K)