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Relationship between surface tension and the shape of a liquid drop

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yjk91
#1
Apr21-08, 01:47 PM
P: 75
i don't know how to describe the relationship between surface tension and the shape of a liquid drop. Also what are the attractive forces that increase surface tension?
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Andy Resnick
#2
Apr21-08, 02:36 PM
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The free energy is minimized by minimizing the surface area. For positive interfacial energy, that corresponds to a sphere (in the absence of gravity). For negative interfacial energy, that corresponds to mixing- *maximizing* the intrfacial area.

The atomic origins of interfacial energy are murky, to put it mildly. One need not discuss atoms to discuss dividing surfaces.
GCT
#3
Apr21-08, 02:54 PM
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Depends on where the drop is - is it on a surface? Cohesion due to intermolecular attractions answers your second question it is your responsibility to find the list of such attractions.

yjk91
#4
Apr21-08, 03:15 PM
P: 75
Relationship between surface tension and the shape of a liquid drop

yes it's on a surface
GCT
#5
Apr21-08, 03:57 PM
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Then factor in adhesion-also research the topic of contact angle-the more the liquid molecule is attracted to the surface the less spherical it's going to be.


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