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Author Topic: Where would bubbles form on a perfectly smooth surface?  (Read 1822 times)

Offline stusl

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Stu Sotozaki-Leech  asked the Naked Scientists:
   
Hi Chris et al,

I've a question for you based on the 2009-11-29 newbielink:http://www.thenakedscientists.com/HTML/podcasts/ [nonactive].

The discussion revolved around champagne, carbonation and spoons.

In the response, it was stated that the bubbles can be seen originating at various points on the container where imperfections occur.

So, here is the question (albeit a bit hypothetical):

If a carbonated beverage was contained in a flawless (perfectly so) container,
where would the bubbles develop? As a follow up, if one were to boil 100% pure water in a flawless pot and no dust particles or some such thing were to be involved, where would the boiling/bubbling begin?

Thanks,

Stu

What do you think?
« Last Edit: 18/06/2010 22:30:03 by _system »


 

Offline Soul Surfer

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Where would bubbles form on a perfectly smooth surface?
« Reply #1 on: 19/06/2010 23:03:14 »
Any one who has tried to boil pure water in a clean test tube knows this!  because there are no nucleation points the water tends to superheat and just does not boil for a while eventually one bubble starts to form and it expands almost explosively and shoots the water violently out of the test tube.
 

Offline stusl

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Where would bubbles form on a perfectly smooth surface?
« Reply #2 on: 21/06/2010 01:38:09 »
Much appreciated, that would be interesting to watch.
What about the carbonation?
 

Offline syhprum

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Where would bubbles form on a perfectly smooth surface?
« Reply #3 on: 21/06/2010 15:42:49 »
The same thing happens when you heat coffee in a microwave oven the heat tends to be inputted away from the sources of nucleation
 

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Where would bubbles form on a perfectly smooth surface?
« Reply #3 on: 21/06/2010 15:42:49 »

 

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