If water evaporates also at temperatures much lower then its boiling point, and so do, I believe, other liquids, how much H$_2$SiF$_6$ (boiling temp. 108 C) is to be found in the steam over boiling water? Can I calculate the ratio of any evaporated liquid in this steam based on its boiling point? And what is the meaning of the boiling point if any liquid evaporates in a varity of temperatures?
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The compound hydrolyzes to hydrofluoric acid in aqueous solution. Here is the vapor-liquid equilibrium behavior of aqueous solutions of HF at a total pressure of 1 atm: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.851.2598&rep=rep1&type=pdf – Chet Miller Apr 25 '18 at 12:32
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Would [chemistry.se] be a better home for this question? – Qmechanic Apr 25 '18 at 13:45
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@Qmechanic This feels smack in the middle of physical chemistry so it's not off-topic here. The last subquestion is very close to a duplicate of https://physics.stackexchange.com/questions/10470/how-does-water-evaporate-if-it-doesnt-boil though. – Emilio Pisanty Apr 25 '18 at 15:00
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The general idea sounds like distillation which is probably not easily covered in a Physics SE answer, however @ChesterMiller 's comment should be noted. See also Wikipedia for this Hexafluorosilicic acid. – StephenG - Help Ukraine Apr 25 '18 at 15:26