What is "Diffusion of gases"?
I need help. Can anyone tell me about diffusion of gases? and some information would be helpful. Thank you very much.
- Anonymous1 decade agoFavorite Answer
diffusion of gases is basically when a gas spreads itself around its container. best example.....farts. when you fart you don't smell it immediately, it takes a while, thats because when it leaves your tush all the molecules are bunched together. then once it enters the surrounding environment the fart molecules start bumping off air molecules (kind of like pool balls hitting off each other) and spreading themselves around the room. that's when the stink hits you.
hope that helps!Source(s): doing a phd in chem
- DeannaLv 44 years ago
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Oxygen molecules are, as you know, part of the air we breathe. In a closed room with no ventilation, carbon dioxide that we exhale builds up if there is nowhere for it to go, and eventually the carbon dioxide levels can become too high and eventually the oxygen might be used up. Ventilation systems move the air continuously, so that fresh air comes into the room, bringing with it oxygen, and stale air is pumped out of the room, removing carbon dioxide. It is a physical process which assists with the diffusion of oxygen and carbon dioxide to keep the air fresh, much as a moving stream or river leading from a lake helps to keep the lake from stagnating. In 1970, when the explosion happened on the Apollo 13 moon mission, one of the many problems mission controllers had was to keep the air moving so that the three astronauts didn't suffocate. They had to rig up filters so that the air could be passed through canisters that would trap the CO2 and release O2, and thankfully it worked. A fish tank operates on much the same principle. The filter not only filters out solids, it absorbs CO2 from the fish using the charcoal in the filtration system so that the water cycled back into the tank has had its CO2 "scrubbed". It is necessary to install a bubble device to keep feeding oxygen into the water for the fish, and this is much like a ventilation system too. Oxygen goes in, stale water is continually drawn into the filter and having its CO2 and nitrogenous wastes trapped by the filter so that the water reentering the tank is fresh. I hope this helped!
- GailLv 44 years ago
This is to maintain a steep concentration gradient of O2 and CO2. Without ventilation, the CO2 would acummulate in the alveolus and this will reduce the concentration/diffusion gradient of CO2, making CO2 diffusing out more slowly. Without Ventilation, the O2 would be lesser in the alveolus than the atmospheric air, this will also reduce the diffusion gradient of O2, making O2 diffusing into blood more slowly too. The greater the concentration difference, the faster the rate of diffusion.
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- 1 decade ago
Diffusion is defined as the spreading out from a concentrated source which results in an increase in the entropy (degree of disorder) of the substance. Diffusion occurs because of the random movement of molecules of the substance which allows them to separate from one another. The greater the space between these molecules the greater the ability for the molecular particles to spread out from one another. The more packed the molecules are in the substance the less space to maneuver ,and therefore, the more difficult for diffusion to occur. For example, solid substances are composed of particles (molecular or ionic) that are more tightly packed together. Because of this tight packing, the particles are not capable of diffusing very rapidly so the speed of diffusion occurs very slowly. If you placed a Lead brick and a gold brick in contact with one another and wrapped them together, it would take several years before the two bricks were "glued" together. This adhesion of the two bricks to one another is due to the fact that the Lead and Gold atoms are moving very slowly. The atoms are able to diffuse into each others solid matrix thus causing them to adhere to one another but only after several years being in contact with each other's surface.
On the other hand, liquid substances are composed of particles that are less packed and indeed can move more freely. Having more space between the liquid particles makes diffusion more likely to occurs at a faster rate. For example, if one placed a drop of liquid colored ink into a glass of liquid water the ink drop would slowly but noticeably diffuse out throughout the water. Since the ink particles are farther away from each other, and the water molecules are spread out, the molecules of ink can diffuse fairly rapidly so that the water is colored homogeneously throughout with the color of the ink in a matter of minutes.
Gaseous substances are in a league all to themselves. The molecular particles of gas are much more distant from one another than either liquid or solid particles are to each other. That is why gases are transparent. Light can pass through the relatively large spaces between the molecules of gas without any distortion. Liquids distort light more so because the particles are closer ,and the light passing through a liquid can be deflected more easily. If a gas possessing an odor such as Ammonia were allowed to escape an open bottle, it would not take but a few seconds for the detectable odor of Ammonia to be detected throughout the room. Ammonia gas molecules having a great deal of space between the particles of Ammonia and air could travel at a faster rate.Source(s): http://members.aol.com/profchm/graham.html
- 1 decade ago
thats what happens when you eat lots of broccoli