Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: nur on 12/04/2009 13:30:03

Title: What happens when beer goes flat?
Post by: nur on 12/04/2009 13:30:03

nur asked the Naked Scientists:
   
Please explain on how the beer going flat in an open bottle is an example of open systems which never allowed to reach equilibrium.

What do you think?

Title: What happens when beer goes flat?
Post by: Chemistry4me on 12/04/2009 13:32:26

The bottle is opened!

Title: What happens when beer goes flat?
Post by: Chemistry4me on 13/04/2009 03:51:16

On a more serious note:

-For equilibrium to be established, the system must be closed.

The solubility of a gas in a liquid depends upon both temperature and pressure.

-Solubility decreases as the temperature increases.
-Solubility increases as the the pressure increase.

In this case, the pressure has decreased (when the bottle is opened), so the solubility of the gases decreases, so the beer goes flat. As the bottle is opened.