Definition of vapour pressure in English:

vapour pressure

Line breaks: va¦pour pres|sure

noun

Chemistry
  • The pressure of a vapour in contact with its liquid or solid form.
    More example sentences
    • At the temperature where the vapor pressure of the liquid is equal to the atmospheric pressure, the liquid is said to be at its normal boiling point.
    • For a given external pressure, there is a temperature at which the vapor pressure of the liquid is equal to the external pressure.
    • This is the temperature at which the vapor pressure of the liquid is the same as that of the atmosphere.

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