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  #21  
Old 02-02-2012
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Quote:
Originally Posted by dabnis View Post
sodium filled valves (how do they do that?) Dabnis
I think they outsource to Cadbury's who use the same process they use to get the caramel inside the Caramilk bar.
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Old 02-02-2012
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Originally Posted by SloopJonB View Post
I think they outsource to Cadbury's who use the same process they use to get the caramel inside the Caramilk bar.
If I remember from my high school chemistry class, sodium is pretty nasty stuff, especially when you put it in water. How about it, some of you chemical engineering or other knowledgeable folks, how do they do it?

Dabnis
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Old 02-02-2012
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I don't know how they did it but I do know why. Sodium melts at 208 degrees. It takes a lot of energy to make the phase change from solid to liquid, so the valve absorbs a tremendous amount of heat at this point without a large change in the temperature of the valve.
I remember as an undergrad chemistry student being fascinated by the concept of something catching on fire upon contact with water. I got hold of a little (1/4" cube) piece of metallic sodium. I dropped in the sink and poured some water on it, and it did just what they said it would.
I was lucky I didn't burn the lab down or get booted out of college. It was a very dramatic reaction.
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Old 02-02-2012
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How Do They Do That?

Quote:
Originally Posted by dabnis View Post
... sodium filled valves (how do they do that?)...

Dabnis
Here is one way: Process for the production of a sodium-filled valve - MTU Motoren- und Turbinen-Union Munchen, GmbH
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Old 02-03-2012
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Ahah!!, Sloop was right.

Dabnis
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