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[personal profile] mattbell
I had a little over 5 pounds of dry ice left over from yesterday's party.  If I didn't use it right away, it would just evaporate.  What to do? 

First, I tried making a vodka slushy.  If you put a bottle of vodka in the freezer, it stays liquid, but it if you use dry ice, you can freeze it.  Frozen vodka has the consistency of wet paste -- it's very slushy.  The taste of frozen vodka is so frostbitingly cold that you don't really taste the alcohol. 

Vodka slush made using dry ice

Next, I decided to dump the rest of the dry ice into a pot of boiling water.  There were several things wrong with this idea... not the least of which was the fact that I had just had two shots of vodka. 

First, the good stuff.  Here's how it looks:
DSC03710.jpgDSC03715.jpg

And a movie:



Here's why it turned out to be a bad idea...

So had just I dumped the remainder of the dry ice (probably 5 pounds worth) into a big pot of boiling water.  It was awesome.... aside from the fact it let out so much CO2 that it extinguished both the flame and the pilot lights.  I started smelling unburnt propane, and quickly reached to turn the jets off.  Even then I was feeling a bit lightheaded.  I had closed the windows to keep the wind from messing up the nice smoke plumes I was filming... another bad idea.  I'd just trapped myself in a room that was rapidly filling with CO2.  I quickly opened several windows. 

I did a little research on wikipedia.   CO2 has a higher density than air, so it tends to move downward.  That explains why it smothered the pilot light.*  Also, by looking up some information and doing some math, I figured out that I raised the CO2 concentration in the kitchen from the normal 0.03% to potentially something like 3% which would make plants happy but can cause dizziness, headaches, fainting, and, eventually, death in people.  Awesome.  I had just confirmed the first two effects on people experimentally. 

The actual risk to me was probably quite low, but I'm glad I have enough of a brain to work out these things before they become real problems.

*Yes, this little light of mine.  I'm going to let it shine.
DSC03731.jpg
There we go.  Back in business.


------

Wow... I should remember that for a price as low as $20, I can have all kinds of crazy once-in-a-lifetime experiences.   Actually, it was more like $5, as dry ice is $1/lb.  
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February 2011

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