Cold water holds more air
Gases dissolve less in warm water.
Warm and cold water
A glass of cold water and a glass of warm water both have oxygen dissolved in them.
Which has more dissolved oxygen?
What this lesson covers
The idea
The solubility of gases in liquids generally decreases as temperature increases, so more oxygen dissolves in cold water than in warm water.
Warm and cold water
A glass of cold water and a glass of warm water both have oxygen dissolved in them.
Which has more dissolved oxygen?
- The cold water
- The warm water
- The same
Cold or warm
Open both tabs.
Opposite to solids
The solubility of gases in liquids generally decreases as the temperature increases. So more oxygen dissolves in cold water than in warm water.
The solubility of gases generally decreases as temperature increases. More oxygen dissolves in cold water than in warm water.
- Solids in liquids | Gases in liquids
- Temperature goes up | Solubility goes up (generally) | Solubility goes down (generally)
Notes
Solids: warmer water dissolves more. Gases: warmer water holds less.
Check yourself
The solubility of gases in liquids generally …
Which water has more dissolved oxygen?
When water warms up, the solubility of oxygen …
Cold water is good for aquatic life because it …
- increases as temperature increases. That is true for most solids, not gases.
- does not depend on temperature. It generally decreases as temperature increases.
- decreases as temperature increases — correct. Yes!
- Cold water — correct. Yes!
- Warm water. The solubility of oxygen decreases when water warms up.
- Both the same. Cold water holds more.
- increases. It decreases.
- decreases — correct. Yes!
- stays the same. It decreases.
- has no oxygen. Cold water holds more oxygen.
- has more sand. More oxygen dissolves in cold water.
- can hold more dissolved oxygen — correct. Yes!