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Vapor pressure database /book

Vapor pressure database /book

Vapor pressure database /book

(OP)
Hi, Please could you advise me a book or an online data base where I could find vapor pressure of organic or inorganic compound in water solution. I need detailed information. I already have Perry's book but is not enought.
I need to vapor pressure at diferent temperatures and diferent concentrations to be able to find the better point to design the process.
Many thanks.

RE: Vapor pressure database /book

Gloria,

For low concentrations (gases), look up the chemical on NIST to find Henry’s law data. For mixtures of higher concentrations of liquids (ala 40% ethanol in water), you are going to need to take a study on thermodynamics, with particular regard for equations of state, vapor-liquid equilibriums, non-ideal mixtures, and activity coefficient models.

I don’t believe the database you have requested doesn’t exist, but databases of VLE data and activity coefficients should exist. You still have to be able to manipulate that data to the temp/pressure you need.

RE: Vapor pressure database /book

Gloria,

Wikipedia is my first stop when I research a new subject. It has good information on vapor-liquid equilibrium, including external links to sources of data, like Dortmund Data Bank, NIST that TiCl4 referenced, DDBST, etc.

If you don't have it already, I recommend you obtain The Properties of Gases and Liquids. The latest is the 5th Edition (2001). It has methods for pure component properties, mixture rules, and fluid phase equilibrium. It also has a property data bank in the appendix, and lots of references, some to data sources. It's a very popular book, you should be able to preview it if you have a technical library nearby.

Good Luck,
Latexman

RE: Vapor pressure database /book

(OP)

Many thaks to all, I'll try all you options.

The reality is that we always work at low solute concentrations. So, if I can found the vapor pressure diagram at low concentrations I have also low precision.

I really appreciate you help.

Glòria

RE: Vapor pressure database /book

The change in vapor pressure of a solvent due to a solute is given by extension of the Clausius - Clayperon equation. For non ideal solutes which ionise / change chemical structure in solution, a vant Hoff correction factor is applied. This applies to both inorganic and organic solutes at low concentrations. Look up "elevation of boiling point" in any Uni Physical Chemistry textbook also. Its been a long time since I read through my physical chem Uni textbook, but these leads should get you the expressions required.
The same solution behaviour also leads to depression in freeze point.

RE: Vapor pressure database /book

(OP)
Good morning,
Thanks to all.

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