Why soda bubbles when you shake it

  • Context: High School 
  • Thread starter Thread starter bobsmith76
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    Bubbles
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Discussion Overview

The discussion centers around the phenomenon of bubbling in soda when it is shaken, exploring the underlying physics and mechanisms involved. Participants examine the role of energy, carbon dioxide, and nucleation in this process.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that shaking the soda adds energy, which is necessary for carbon dioxide to form gas bubbles, and seeks confirmation of this idea.
  • Another participant provides a link to an external website that discusses the topic, indicating it offers answers related to the bubbling phenomenon.
  • A third participant expresses gratitude for the link, implying it was helpful in understanding the issue.
  • A different participant challenges the explanation provided in the linked resource, arguing that it is incomplete or incorrect, particularly regarding the effects of shaking after removing the lid.
  • This participant introduces the concept of nucleation, comparing it to the behavior of microwaved clean water that can explosively boil when disturbed.

Areas of Agreement / Disagreement

Participants do not reach a consensus; there are competing views on the explanation of bubbling in soda, particularly regarding the role of energy and nucleation.

Contextual Notes

Some assumptions about the behavior of carbon dioxide and the conditions under which bubbling occurs remain unresolved, particularly concerning the effects of shaking with or without the lid on.

bobsmith76
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I understand most of the physics of soda. The bubbles are carbon dioxide in the form of gas and they are rushing to the top to escape from the liquid. I'm trying to figure out why soda bubbles when you shake it. My guess is that when you shake it you're adding energy (work) to the soda and carbon dioxide needs more energy to form gas bubbles in the soda, so that added energy causes the carbon dioxide gas. Let me know if this is correct.
 
Physics news on Phys.org
http://www.whyzz.com/why-does-soda-explode-when-you-shake-it-up
 
thanks for the webiste link, that answers things.
 
The answer they give in that link is either wrong or incomplete. If you take the top off first and then shake it, then you cannot be forcing the carbon dioxide gas just under the lid back into the liquid because it has already escaped. If you follow their line of reasoning, shaking after removing the lid should do nothing. And yet, experience shows that shaking increases the bubbling whether the lid is on or off.

I think it is a case of nucleation. It is the same reason that microwaved clean water can explode in your face when you shake it.
 

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