Oxygen tanks for diving

  • Thread starter Serj
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  • #1
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Why do scuba divers need oxygen tanks if air is already dissolved in the water? Why can't they just undissolve the trapped gas like when you shake up a bottle of carbonated soda?
 

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  • #2
Borek
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Soda bottle is oversaturated (once opened). Partial pressure of oxygen in water is too low in normal conditions for the oxygen to be easily taken out from the water. But IIRC it is done on the submerged submarines.
 

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