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The solubility of oxygen in water is temperature-dependent, and about twice as much (14.6 mg·L−1) dissolves at 0 °C than at 20 °C. To illustrate, recall bubbles forming in a pot of water right before it begins to boil; these bubbles are oxygen that was dissolved at room temperature, but is being ejected as the temperature rises. Oxygen can slip into the crevasses or “holes” that exist in the loose hydrogen-bonded network of water molecules without forcing them apart. A very physical perspective on solubility of oxygen in water is that when the water is colder, the water molecules move less, and the oxygen remains trapped in the aqueous solution.

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Q: Why does cold water hold more oxygen?
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Why is oxygen bad in water?

Cold water can hold more dissolved oxygen than warmer water.


How much air is in hot water Is there more air in cold water under the same pressure of course?

Colder water can hold more oxygen than warmer water.


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Because cold water absorbs more oxygen*


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Hot water will hold more salt than cold water, because solubility of solids is proportional to temperature. That is, it increases with temperature.


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How does cold temperature affect the oxygen in cold water?

Oxygen and other gases can dissolve in water just like solid solutes (such as sugar or salt).The total amount of oxygen that can be dissolved in water depends on a number of factors, one of which being temperature. Unlike most solids, gases dissolve better in colder solvent. Colder water can hold more dissolved O2. Therefore, as water is warmed, the oxygen and other atmospheric gases come out of solution.You can see this happen if you take a sealed bottle of cold water and let it warm up slowly at room temperature. Disregarding the droplets of condensation that might form on the outside of the bottle, you can see tiny bubbles forming along the interior walls of the bottle.Marine biologists postulate that it is cold water's ability to hold greater concentrations of oxygen that allows polar marine species such as king crab and deep-sea jellyfish to grow so large.On a more practical note, this is also why you should open fizzy drinks when the liquid is cold to prevent losing more carbon dioxide (unless you enjoy flat soda).


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Hot water dissolves the sugar particles faster than cold because of energy. The higher energy allows faster moving of particles as they are more energetic and this helps dissolve the sugar.