On the saturated vapor pressure of solids
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The saturated vapor pressure of liquids is easy to understand, but what about solid substances? Is there a saturated vapor pressure? I used Aspen to calculate the saturated vapor pressure of aluminum chloride, assuming a liquid phase. However, the boiling point of aluminum chloride is 180 degrees; so how does Aspen determine the saturated vapor pressure at temperatures below 180 degrees (when it should theoretically be in a solid state)? Is the saturated vapor pressure obtained through liquid-phase treatment still valuable? I’m not sure if I made myself clear? I hope an expert can answer. Thank you. .
Solid substances also have a saturated vapor pressure; the saturated vapor pressure obtained by treating them as liquids is not meaningful, as the phase state differs and the saturated vapor pressures can vary significantly. If it cannot be found in Aspen, it can be looked up in some manuals
So I wonder if the saturated vapor pressure of solid substances can only be found in a handbook? Can’t it be calculated in Aspen? Is the calculated saturated vapor pressure of the liquid phase then useless? Looking forward to an answer. PS: Why is it said that I can get three points today, yet I’m still considered to have exceeded the scoring limit? Is my rank too low? Sweat… Anyway, thank you
Solids certainly have vapor pressure. Think about ice – isn’t it a solid? Ice has vapor pressure just like water. You can understand this if you consider the nature of vapor pressure. However, the vapor pressures of supercooled water and ice are different, as can be seen from the water triphase diagram. The same principle applies to other substances as well. This is just my humble opinion; please take it as reference