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If co2 turns to a solid at -109F and the coldest place on earth was measured to be -135F (click[^]) does co2 "freeze" at that point? Is any co2 in the air if you were to be there?
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That's cool.
There's only 0.039% (by volume) CO2 in the air though. That's a way too low partial pressure.
So I would predict that nothing would happen, unless you collected a whole bunch of the stuff in one place.
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Although 4% of exhaled air is CO2 so, if you were foolish enough to be outside in such an environment, you might see your exhaled breath fall downwards. The 90%+ that is still oxygen & nitrogen staying aloft, but the remaining water vapour & CO2 condensing & falling to the ground.
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pt1401 wrote: condensing & falling to the ground.
Not necessarily. The air is full of particulates composed of materials with molecular weights greater than the primary components of air (like dust mites and their feces), They don't fall, but rather, disperse, due to Brownian motion: the energy imparted to them by being banged around randomly by all of the air molecules. A particle needs to be large enough to fall if it's not in a vacuum.
(large enough depends upon the surroundings: in vacuum, everything is large enough).
(this all depends upon the size of the particulates resulting from the condensation).
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "As far as we know, our computer has never had an undetected error." - Weisert | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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True, but it also depends on the temperature - there's not a lot of Brownian motion at -135 degF
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Concentration plays a part as well as temperature. Take, for example, water vapor: the Brownian[^] motion of the air molecules and the macro movement of air currents keep some of the vapor from freezing out. The concentration of CO2 in the air is less than the concentration of H2O, so carbon dioxide cannot freeze out, either.
If you want naturally occurring dry ice, you'll need to head to Mars: during the winter, the colder pole can get as low as −143 C, resulting in a layer of CO2 snow.
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Gregory.Gadow wrote: The concentration of CO2 in the air is less than the concentration of H2O, so carbon dioxide cannot freeze out, either.
No - it's an effect of a substance's partial pressure at a given temperature (vs. the solid/liquid states with which it is in contact). The materials attempt to create an equilibrium which is the appropriate partial pressure for a given conditions in contact with the solid/liquid source. IF there's not enough of the solid/liquid available to reach the equilibrium state then it all goes into the gaseous state.
An example of partial pressure would be smell of alcohol when you open a bottle: it's boiling point is above room temperature. It has a significant partial pressure and thus alcohol molecules leave the liquid phase and become a vapor above the liquid. If the bottle's closed - it stops pretty quickly. If the bottle's open, it never reaches equilibrium and so all the alcohol evaporates. The partial pressure of a solution (example, alcohol + water) is equal to the partial pressures of each component weighted by its relative molal volume. 100pf thus has a tad more than half the vapor pressure of grain neutral spirits.
The CO2 could potentially be flash-frozen into the solid state, kept aloft by Brownian motion, and then re-sublime in a vain attempt to reach equilibrium with the atmospheric CO2. Frosty breath.
Since this is CP, it is unlikely that alcohol would ever be in (1) a closed bottle or (2) allowed to evaporate from an open bottle. The actual situation is better addressed by biochemistry, of which I claim not expertise whatsoever, except, perhaps, with well peated single-malt Scotches
http://en.wikipedia.org/wiki/File:Carbon_dioxide_pressure-temperature_phase_diagram.svg[^]
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "As far as we know, our computer has never had an undetected error." - Weisert | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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Gregory.Gadow wrote: Concentration plays a part as well as temperature.
So if you REALLY focus...
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So that means global warming isnt true eh? 
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Was wondering when you were going to chime in. 
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With great planning, you can set a camera in the same place and take a picture of the sun at the exact same time of day; in the resulting composite, the sun traces out a figure 8 shape called an analemma[^]. With even greater planning, you can get a tutulemma[^], an analemma with a total solar eclipse.
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I was about to sy man, that is really cool!
...but then I realized it wasn't - closer to 16 million Kelvin, in fact. 
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Way cool. 
Always give 100%.
Unless you are donating blood...
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To Infinity & Beyond 
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Sort of like Aleph(n) with n → ∞ ?
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I was thinking Toy Story! Buzz Lightyear
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Cool...
I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is (V).
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A few minutes ago my boss started to shouting at me about an immediate solution for something he ignored over weeks (I have 7 emails to prove it!). When I told him that he can't talk me like that, he took his way and went home!
I'm a pissed - a lot  !
I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is (V).
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Well if he's gone, you have nothing to worry about!
Part on down, dude!  ![Beer | [beer]](https://www.codeproject.com/script/Forums/Images/beer.gif) ![Jig | [Dance]](https://www.codeproject.com/script/Forums/Images/jig.gif)
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Pissed, why? Now you can work in peace with the boss gone.
It is always a good idea to keep the paper trail when situations like this arise. You are in the clear. Now you can work on the solution in the manner and time it requires. So you will have it done by Friday then?
It was broke, so I fixed it.
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I can make up any solution he wish for - but HE must have HIS decisions, that's why HE is the boss.
So why shout for a solution, that in your hands...
I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is (V).
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1, 2 ,3, 4... I can tell you are still quite upset about this.
Shouting usually means that person has lost control and is angry about it. In this situation it is best to remain calm or walk away. Your boss did wrong by shouting at you but he left before he could do anymore damage. If this guy is usually a decent person he will feel quite bad about this, I would. Hopefully he will apologize and you can move on.
If this is typical behavior for him I would talk to your HR person. If this guy is the owner of the company or some other untouchable, it is time to look for another job.
I certainly hope that this works out for you.
It was broke, so I fixed it.
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Thank. Event to spill it out here made me feel better...
I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is (V).
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Sounds like he's not really your boo[^].
modified 23-Dec-13 16:22pm.
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