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Old Sep 18th 2014, 05:54 PM   #1
autumn
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EVAPORATION in vacuum and argon

Hell everyone,
i have read a paper about evaporation of phosphorus from the surface of silicon melt in VACUUM (P=5x10-3Pa). It mentions that the evaporation process of phosphorus is as follows:
P(solid)->P(gas). When this evaporation reaction reaches equilibrium, the equilibrium constant can be calculated as:
K=Pp/Patm/aN
Pp: the equilibrium partial pressure of phosphorus; Patm=101325Pa; a-activity coefficient; N-molar fraction of phosphorus in the surface of Si melt

If now i consider the evaporation of phosphorus in ARGON (P=60torr), can i use the same equation as mentioned above to calculate K??
Thank you,
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