How the bubble size in a champagne bottle evolve ? Is it fixed or is evolving with time ?

  • $\begingroup$ this is not interesting comment $\endgroup$ – Mathieu Krisztian Jan 16 at 17:48

When the bottle is closed, part of the gas is dissolved in the liquid. The portion that is not dissolved is responsible for the pressure. Any additional gas leaving the liquid increases the pressure, what prevents the continuation of the process.

When it is opened, the pressure is atmospheric, and the fraction of stable dissolved gas is certainly much smaller that the actual content.

But for the molecules of gas form a gas phase (a bubble), it is necessary also to form an interface liquid-gas (the bubble spherical surface).

Where only very few molecules gather, the free energy to escape to form a gas is not enough to form the surface (that requires some energy), and they return to the dissolved status.

Where their number is big enough, the critical radius is reached, and a stable bubble is formed. Once that happens, the dissolved gas in the neighborhood can migrate to the existing bubble, that grows as a consequence.

It is a process of nucleation and growth, common to many changes of phases.

  • $\begingroup$ thanks. But then, when does the bubble growth stop ? (why does it growth for ever ?) $\endgroup$ – Mathieu Krisztian Jan 17 at 8:40
  • $\begingroup$ They grow and go up because are lighter than the liquid. Once at the surface, the gas goes to the atmosphere. $\endgroup$ – Claudio Saspinski Jan 17 at 10:41
  • $\begingroup$ thank you. So, are you meaning that during the travel to the surface, their volume increases ? $\endgroup$ – Mathieu Krisztian Jan 17 at 10:43
  • 1
    $\begingroup$ The time of travel is short. But the tendency is that existing bubbles grow. $\endgroup$ – Claudio Saspinski Jan 17 at 11:29

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