Decompression Sickness
You can witness the results of offgassing by opening a carbonated beverage.Ingassing & Offgassing
Liquids contain dissolved gasses, and the amount of gas dissolved depends on the pressure surrounding the liquid. Carbonated beverages such as soda are an excellent example.
Soda is carbonated by forcing pressurized carbon dioxide against its surface. The pressure of the carbon dioxide is greater than the pressure of the gasses already dissolved in the soda, so the soda absorbs the carbon dioxide until the pressure of the absorbed gas and surrounding gas reach equilibrium. This process is called ingassing.
When you open a soda bottle, the pressure above the soda is less than the pressure of the dissolved carbon dioxide. This allows the soda to release, or offgas, its excess carbon dioxide. It continues to offgas until equilibrium occurs and the soda becomes flat.
Soda is carbonated by forcing pressurized carbon dioxide against its surface. The pressure of the carbon dioxide is greater than the pressure of the gasses already dissolved in the soda, so the soda absorbs the carbon dioxide until the pressure of the absorbed gas and surrounding gas reach equilibrium. This process is called ingassing.
When you open a soda bottle, the pressure above the soda is less than the pressure of the dissolved carbon dioxide. This allows the soda to release, or offgas, its excess carbon dioxide. It continues to offgas until equilibrium occurs and the soda becomes flat.
