2024年4月28日发(作者：)

液体表面张力的测定（Determination of surface tension of

liquids）

Experiment five

Experiment five experiment five

Experiment five

Determination of surface tension of liquids

Determination of surface tension of liquids - Determination of

surface tension of liquids

Determination of surface tension of liquids

Two billion eight million two hundred and one thousand two

hundred and five

2008201205, 2008201205

2008201205 Liu senior

Liu Zizheng Liu Zizheng

Liuzizheng

1 objective (1) to determine the surface tension of ethanol

solution with different concentration, and calculate the

surface adsorption capacity and the transverse of ethanol

molecule

Sectional area.

(2) to understand the properties of surface tension and the

relationship between surface tension and adsorption capacity.

(3) grasp the principle of maximum bubble pressure method for

measuring surface tension and surface adsorption capacity of

solution. 2 the principle of experiment is that in a liquid

interior, the attraction of any molecule is balanced. But on

the surface of the liquid

The molecules are different. Because the molecules on the

surface layer are attracted by the molecules in the liquid layer

on the one hand, they are exposed to the other

The attraction of gas molecules outside the liquid, and the

action of the former is greater than that of the latter.

Therefore, on the surface layer of liquid surface

Each molecule is subjected to an unbalanced force that is

perpendicular to and directed toward the interior of the liquid.

This appeal is apparent on the surface

The molecules push inward to make up the smallest area of the

liquid. To increase the surface area of a liquid, it is

necessary to have resistance

To do work, increase the potential energy of molecules.

Therefore, molecules are larger in the surface layer than in

the liquid