The relationship between vacuum degree and boiling point
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Surely, the higher the vacuum level, the lower the boiling point. I want to know the boiling point at normal pressure, and also what formula can be used to calculate the boiling point under a certain level of vacuum
This should be found by looking it up in a table! There’s no calculation formula, right?
There is no formula, and it is nonlinear. However, in general cases where the pressure is above atmospheric pressure, the Antoine equation can be used for a rough calculation; it has three parameters. The parameters are available for reference.
There is no universal formula; each specific substance must be treated individually
There is also a general formula for this, namely the so-called Clapeyron equation, or Clausius-Clapeyron equation. This equation is strictly valid, but it is merely a differential equation and cannot be used directly for calculation. Under certain approximate conditions, it can be integrated to yield the Antoin equation mentioned above.
Normally, the vacuum level should be low, and so should the boiling point
Reply to 1# No Regrets for the Past Years: There is a formula, but it was devised by an elderly professor; I can give it to you if you want it
The last edit to this post was made by emirateyi on 2011-7-18 at 09:21. Another approach is to use simulation software; for example, Aspen can be used to generate bubble point curves