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### Topic: Tables or calculator for pressure vapour for severals gases at a given temperatu  (Read 5979 times)

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#### alphabeta

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##### Tables or calculator for pressure vapour for severals gases at a given temperatu
« on: December 10, 2012, 02:33:51 PM »
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

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #1 on: December 11, 2012, 12:48:14 PM »

#### alphabeta

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #2 on: December 11, 2012, 12:59:02 PM »
Of course!
You found something ?

#### curiouscat

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #3 on: December 11, 2012, 01:05:40 PM »

#### alphabeta

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #4 on: December 12, 2012, 04:06:11 AM »
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

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #5 on: December 12, 2012, 04:14:40 AM »
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

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #6 on: December 12, 2012, 05:26:18 AM »
No no, I am speaking about the boiling point at 278 K of those gases.

Sorry for my poor explanation.

#### curiouscat

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #7 on: December 12, 2012, 05:32:47 AM »
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

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #8 on: December 12, 2012, 05:51:02 AM »
Perhaps you looking for pressures at which these gases boil at 278 K?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

#### alphabeta

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #9 on: December 12, 2012, 05:56:36 AM »
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

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #10 on: December 12, 2012, 05:58:09 AM »
Quote
The gases are CO2, lithium chloride, methyl, and ammonia.
The is no such gas.
AWK

#### curiouscat

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #11 on: December 12, 2012, 06:05:40 AM »
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.

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

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##### Re: Tables or calculator for pressure vapour for severals gases at a given temperatu
« Reply #12 on: December 12, 2012, 06:46:14 AM »
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.