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5. Residual pressure
The part of the barometer tube above the upper meniscus is assumed to be perfectly evacuated. In fact, this space is at least filled with mercury vapour, at a pressure equal to the saturation vapour pressure p
s
. This, expressed in pascals, is given by the following empirical formula
where T is the thermodynamic temperature expressed in kelvin. For temperatures close...
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Residual pressure
Capillary depression
References
Organizations
Bureau de Recherches Géologiques et Minières - Service géologique national.
Institut National de Métrologie (INM)
Bureau International des Poids et Mesures (BIPM)
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