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Swimming coaches sometimes suggest that a drop of alcohol (ethanol) placed in an ear plugged with water "draws out the water" Explain this action from a molecular point of view.
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Intermolecular Forces and Liquids and Solids
University of Central Florida
University of Maryland - University College
In physics, a solid is a state of matter characterized by rigidity and resistance to changes of shape or volume. Solid objects have a definite volume, they resist forces (such as pressure, tension and shear) in all directions, and they have a shape that does not change smoothly with time. The branch of physics that studies solids is called solid-state physics. The physical properties of solids are highly related to their chemical composition and structure. For example, the melting point of ice is significantly lowered if its crystal structure is disrupted.
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, a liquid is one of the four fundamental states of matter (the others being solid, gas and plasma). A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds. Water is, by far, the most common liquid on Earth. Like a gas, a liquid is able to flow and take the shape of a container. Most liquids resist compression, although others can be compressed. Unlike a gas, a liquid does not disperse to fill every space of a container, and maintains a fairly constant density. A distinctive property of the liquid state is surface tension, leading to wetting phenomena.
Ethanol is very soluble in…
Concept ReviewExplain …
all right, So this problem are this trick with swimming has to do with the strength of inter molecular forces. So let's say that somewhere deep inside of their year, you've got a droplet of water that's just stuck there. And it doesn't want to leave now Water by itself and hydrogen bond with itself. In fact, I can hydrogen bond in two different places and from both hydrogen. The water is very strongly attracted to itself, and water is very good at, and he adhering other surfaces like the inside of your year. So this droplet here very strongly connected to itself. It doesn't want to leave, however, if you look at ethanol, ethanol structure looks like this, but still has, so it still has no age group on here, so this hydrogen can still hydrogen bond, but it can only hydrogen bond in one place, and the rest of the molecule is not as polar as water is. So because of this, it can still dissolved in the water. But because it's less polar, it's going toe weaken the overall strength of the water droplet because molecules have been introduced that can't bond to each other as well as pure water again. So because we've now weaken the strength of our water droplets, it's it'll be easier to get the water droplet out of there.
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