manicmajor

Much appreciated

Pardon if the image is too dark - MS Paint doesn't allow bright/contrast editing... Here's what the valves are: Valve 1: Gate valve for mixing the gases Valves 2,3: Two ends of mixing chamber Valve 4: Connects system to vacuum pump Valves 5,6,7: Connects to chose gas source Valve 8: Connects gas to system The experiment was initially done as two experiments: Argon and Helium with Carbon Dioxide as a carrier gas. The initial pressures of both components (be it CO2 and Ar or CO2 or He) would be taken, and then the Argon/Helium would mix with the CO2. The system pressure would be recorded and then the cold trap would be immersed in Liquid Nitrogen to freeze the CO2. The Ar/He would be vacuumed out and another pressure reading would be recorded. The diffusion constants for the gas pairs would be calculated using some equations for the text... The question was if it would be possible for hexane and HCl to be put in that setup and measure their diffusivity constants or if not, how ... I've been trying to figure this one out with some friends, and no one seems to know. Unfortunately, I have to seek elsewhere for help

I'm trying to find some information on how to find a way to diffuse hexane and HCl, but as they're both in liquid form, I would have to change the system parameters. Is it possible to find their diffusivity constants using pressure readings?

What is UFL?

That was what I was trying to figure out

I tried looking up information regarding the BET Theory (http://en.wikipedia.org/wiki/BET_theory), but I was unable to find anything related to assumptions made from the BET Theory. Background: I'm doing a lab report on physical adsorption. A discussion question asks "Consider each of the five assumptions inherent to BET theory..." I understand the equation as listed in Wikipedia, but would anyone know assumptions that were made or can be pulled from the equation?