Détermination de la pression de vapeur de HgCl_2 par la méthode d'effusion de Knudsen
Abstract
The mercuric chloride (HgCl2) vapor pressure was measured between 343 and 454 K by the Knudsen cell method at relatively high pressures where the flow rate is not purely molecular. Four cells with different orifice sizes were used. Knudsen equation cannot explain accurately the experimental mass loss by using molecular plus hydrodynamical equations. Calculations from our measurements were performed taking into account of an “effective radius” for our orifices, and this radius depends on the relative weight of the two contributions. We compare our results with those existing in literature.
- Publication:
-
Journal de Physique III
- Pub Date:
- February 1997
- DOI:
- 10.1051/jp3:1997124
- Bibcode:
- 1997JPhy3...7..311B