Question

What is capillarity? Describe the capillary rise method for finding the surface tension of a liquid.

Answer 1

Answer:

1. Capillarity is the combined effect of cohesive and adhesive forces that causes water and other liquids to rise in thin tubes or other constricted spaces.
2. The water continues to climb up the tube until the downward force of gravity on the water equals the upwards force caused by the surface tension.
3. Clamp the horizontal handle of the metallic plate in a vertical stand so that the capillary tube and the pointer become vertical.
4. Adjust the height of the metallic plate that the capillary tubes dip in the water in open dish.
5. Adjust the position of the pointer such that the tip touches the water surface.

Answer 2

Answer:

Yo bro the answer is

Explanation:

Liquids that rise in small-bore tubes inserted into the liquid are said to wet the tube, whereas liquids that are depressed within thin tubes below the surface of the surrounding liquid do not wet the tube. Water is a liquid that wets glass capillary tubes; mercury is one that does not. When wetting does not occur, capillarity does not occur.

Capillarity is the result of surface, or interfacial, forces. The rise of water in a thin tube inserted in water is caused by forces of attraction between the molecules of water and the glass walls and among the molecules of water themselves. These attractive forces just balance the force of gravity of the column of water that has risen to a characteristic height. The narrower the bore of the capillary tube, the higher the water rises. Mercury, conversely, is depressed to a greater degree, the narrower the bore.