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Salt dissolves better in hot water than in cold water, but gases dissolve better in cold than in hot water.
The reason salt dissolves better in hot water, is that heated water molecules have greater kinetic energy. Since the molecules move around more, the attractions between water molecules are weaker, and salts are able to enter.
The reason gases dissolve better in cold water, is that gases want to escape water. However, they are trapped by the water molecules. When the water is hot, the molecules move around more, and there is more space between them. Gases are then able to escape. When the water is cold, the molecules stick close together, and trap the oxygen.
In other words, the same conditions that help salts dissolve in water, allow gases to escape water.
Wiki User
∙ 10y ago
Wiki User
∙ 14y agoNo. Cold water dissolves more oxygen than warm. There is lower thermal energy in colder water, and this lack of energy allows for intermolecular forces to keep O2 and H2O "bonded" by dipole - dipole forces. The 2 partial positive H's will induce a dipole on the O2, making the end of the O2, facing the hydrogen of the H2O, partially negative and attracting it to the partial positive H's. This makes the other side of the O2 partially positive. Then the partially negative O of another H2O will be attracted to the partially positive O of the induced dipole, and the O2 will be dissolved in the water. The greater the thermal energy, the more movement of molecules, the less chance for these intermolecular forces to act.
Wiki User
∙ 12y agoCold air is denser than warm air, so there is technically more oxygen per unit of volume, but the same is true of all the other gasses in air. The composition does not change with temperature.
Wiki User
∙ 10y agoColder water will have a higher dissolved oxygen (DO) level than that of warmer water, because gases are trapped by the water molecules at cold temperatures. When the temperature rises, the molecules move around more, and gases, such as dissolved oxygen, are able to escape.
Wiki User
∙ 14y agoBecause the ability of a liquid to dissolve anything is normally greater at lower temperatures (the molecules jostle around less when it's colder).
Wiki User
∙ 13y agoCold water can dissolve more oxygen than warmer water.
Wiki User
∙ 12y agoWarm water is more able to dissolve oxygen gas than cold water.
Wiki User
∙ 10y agono
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Cold air is than warm air?
Cold air is more dense and less buoyant than warm air.
Cold air exerts more blank than warm air?
air molecules in cold air exert more pressure because they are closer together and collide more often
Does warm air have more density tan cold air?
Not really. Warm air usually has a higher volume than cold air, so its density is usually smaller than that of cold air.
What are the characteristics of warm and cold air for weather?
Warm air is lighter and therefore rises. Cold air holds more water and is heavier. Cold air sinks lower than warm air.
What kind of density do warm air and cold air masses have?
Cold air is more dense than warm air. This is why cold air masses tend to descend, and warm air masses tend to rise.
What are the reasons plants are more abundant in cold seas than warm seas?
Because cold water absorbs more oxygen*
Why aquatic species feel comfortable in cold water rather than warm water?
Fish survive better in cold water then in warm water because :- 1) Cold water has more oxygen and more oxygen means more microscopic life which means more food. 2) In Cold water there is more solubility of the carbon dioxide released by the fish
What is cold air more than warm air?
Cold air is more dense than warm air.
Is cold water more or less dense than warm water?
cold ocean waer has more dense than warm water.
What is more dense cold water or warm?
cold ocean water is more dense than warm water
Cold air is than warm air?
Cold air is more dense and less buoyant than warm air.
More oxygen will in colder water than in warmer water?
The warmer the water the less oxygen it holds.
Does cold air hold more than warm air?
No. Warm air is capable of holding much more water vapour than cold air.
Why is cool air denser than warm air?
There are more atoms in cold air than warm.
Eyeballs feel warm?
kinda its more like room temperature but its more warm than cold
Is the air more saturated in cold or warm weather?
Warm air holds more moisture than cold air. In warm weather, there is increased evaporation of sea water.
How is the density different for warm and cool air?
The molecules in warm air will vibrate creating small spaces around them. this makes warm air less dense than cold air. For instance a car in cold weather will produce slighty more power due to the increased density of air supplying more oxygen.
