Topic
explain why water has these characteristics: capillary action, viscosity, surface tension, and beading
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explain why water has these characteristics: capillary action, viscosity, surface tension, and beading
Hydrogen bonding at the surface layer.
Think of it like this.
Hydrogen bonding is an electrical force attracting each water molecule to its closest neighbors in all 3 dimensions.
But the surface layer of molecules have no neighbors on 1 side. They have some force leftover, called the surface tension, which bonds the surface layer more strongly to itself.
This creates a kind of skin, the meniscus, so tough an insect can walk on a pond.
In small bunches of molecules the meniscus becomes the skin of tiny water balloons. These r droplets, or beading.
Viscosity is the stickiness of the molecules to each other.
Capilliary action occurs if the surface tension attraction to the glass (or other material) is greater than the bonding force between molecules within the liquid.
capillary action is explained when the adhesive (forces btw 2 diff molecules) between water and the glass overcome the cohesive forces between water-water molecules. hence the water rises till the cohesive and the adhesive forces are balanced. surface tension is explained by the above phenomenon too.. in this case its given by the formula 0.5 * inside diameter of capillary tube*density* height* acceleration. and i have no idea about beading.
See, this is what happens when you forget your chemistry book!
because it is bored
and it needs something to do.
like dogs and barking.
Hydrogen bonding, and a dipole moment
google it!
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