Headspace Concentration calculation
Headspace Concentration calculation
(OP)
I have a headspace calculation problem that is very long. To start I can't find the method to determine the concentration of the headspace of a vessel containing a liquid such as ammonia. I know the molecular weight, vapor pressure, ambient temp, volume of cylinder, and all of that stuff, but cannot find the method to calculate the vapor concentration of a closed vessel that is allowed to reach equilibrium. So in short how do I calculate the concentration of the space above a liquid in a cylinder sitting on a lab counter?





RE: Headspace Concentration calculation
Is this homework?
Good luck,
Latexman
RE: Headspace Concentration calculation
Now, for the number of moles in the vapor space, I guess you can use Henry's law. If you know the partial pressure of Amonia on top of the cylinder, then you can calculate the number of moles from the ideal gas law n=PV/RT. You know the P (from Henry law), you know the v (volume) and R and T.
I hope this helps buddy..
RE: Headspace Concentration calculation
RE: Headspace Concentration calculation
Good luck,
Latexman