[alphabeta]

Hello everyone,

I would like to find vapor pressure for severals gases at a given temperature, 278 K.
Do you have tables or a little calculator which uses those tables to do this please ?
I am using Linux by the way, if there is a good software to do it.
The gases are CO2, lithium chloride, methyl, and ammonia.

Thank you very much,

[curiouscat]

Tried Google / Wikipedia?

[alphabeta]

Of course!
You found something ?

[curiouscat]

Of course!
You found something ?

For NH3 alone:

http://en.wikipedia.org/wiki/Ammonia_(data_page)#Vapor-Liquid_Equilibrium_Data

http://www.engineeringtoolbox.com/ammonia-pressure-temperature-d_361.html

http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=2#VaporPressureGraph

....and hundreds of similar links.

Hope I didn't mistake your Question?

[alphabeta]

Actually I have made a mistake in my question, sorry.

What I want is the Pressure of evaporation of those gases at a given temperature 278 K.
Thus, the pressure that permits at this temperature to have a spontaneous evaporation.

Thank you very much,

[curiouscat]

Actually I have made a mistake in my question, sorry.

What I want is the Pressure of evaporation of those gases at a given temperature 278 K.
Thus, the pressure that permits at this temperature to have a spontaneous evaporation.

Thank you very much,

That's the same as Vapor Pressure I think. Why do you think you made a mistake?

[alphabeta]

No no, I am speaking about the boiling point at 278 K of those gases.

Sorry for my poor explanation.

[curiouscat]

No no, I am speaking about the boiling point at 278 K of those gases.

That makes no sense (at least to me).

Try this:  What is the boiling point of water at 278 K? Does that have an answer? If you answer that maybe I'll know better what you are trying to find.

[Borek]

Perhaps you looking for pressures at which these gases boil at 278 K?

[alphabeta]

Yes, a boiling point for a pure gas is definied by a Pressure and a Temperature.
I would like to find the pressure of the boiling point corresponding to the temperature 278 K for those gases.

[AWK]

The gases are CO2, lithium chloride, methyl, and ammonia.

The is no such gas.

[curiouscat]

Yes, a boiling point for a pure gas is definied by a Pressure and a Temperature.
I would like to find the pressure of the boiling point corresponding to the temperature 278 K for those gases.

So what's wrong about the links I gave you? Say,



From this graph at 278 K Pressure seems to be around 8000 mm Hg.

Did you have a look at those links at all?

[alphabeta]

Ok, sorry for disturbing you I think I have what I need.

Thank you a lot, I cannit explain what was wrong in my mind, but I think now it is clear.