Can anyone tell me the explanation of surface tension

1. Liquids such as water produce a force that shrinks the surface as much as possible, and this force is called "surface tension". The water droplets that condense on the leaves in the early morning and the water droplets that fall slowly from the faucet are all formed by the action of surface tension. In addition, the reason why water striders can stand on the surface of the water is also due to the action of surface tension.

2. Liquids have cohesion and adsorption, both of which are manifestations of molecular gravity, cohesion enables the liquid to resist tensile stress, and adsorption allows the liquid to adhere to other objects.

3. At the boundary between liquid and gas, that is, at the interface between the surface of the liquid and two liquids that cannot be mixed, an extremely small tensile force is generated due to the attraction between the molecules. Suppose there is a thin film layer at the surface that is subjected to the tensile forces of this surface.

Surface tension refers to the tension of the surface layer of a gas or liquid acting on either boundary along the surface due to the imbalance of molecular gravitational force. In general, the forces on the molecules at the interface are different from those within the phase body due to different environments. The net force of a water molecule inside the water by the forces of the surrounding water molecules is 0, but not a water molecule on the surface.

Because the attraction of the gas-phase molecules in the upper space to it is less than the attraction of the internal liquid-phase molecules, the resultant force of the molecule is not equal to zero, and the direction of its resultant force is perpendicular to the inside of the liquid, resulting in the surface of the liquid having a tendency to shrink automatically, and this contractile force is called surface tension. Surface tension is a property of matter, and its magnitude is related to the temperature and the properties of the two-phase substance at the interface.

.Liquid, when the liquid and the gas come into contact, a surface layer will be formed, and the mutual attraction that exists in this surface layer is the surface tension, which can make the liquid surface shrink automatically. Surface tension is caused by a large cohesive force between the molecules of the liquid.

Not only the surface layer between the liquid and the gas, but also the "surface layer" between the liquid and the solid wall, this thin layer of liquid is often called the adhesion layer, and it also has surface tension. This surface tension determines that there are two phenomena that occur when a liquid and a solid come into contact: non-wetting and wetting.

When mercury falls onto the glass, it is spherical, that is, the contact surface between the mercury and the glass has a tendency to shrink, and this phenomenon is not wet. When water droplets fall onto the glass, they slowly spread along the glass, and the contact surface tends to expand, which is a phenomenon called infiltration. Although mercury cannot soak the glass, after wiping the zinc plate with dilute sulfuric acid and then dripping mercury on the plate, we will see that the mercury slowly spreads along the zinc plate and is no longer spherical.

Therefore, the same liquid can infiltrate some solids, but not others. Mercury can infiltrate zinc, but not glass; Water can soak into the glass, but not paraffin.

The physical definition is: the tensile force that interacts between any two adjacent parts of a liquid surface perpendicular to their unit length demarcation line. Let me introduce it in detail in human terms, for example, if you pinch a glass ball with your fingers and squeeze it, the glass ball will pop out when you are pressed by your two fingers; In the same way, water (liquid) is composed of molecules, there is an interaction force between molecules, when two molecules are too close to each other, they attract each other when they are too far away, there is an optimal distance between them, due to the influence of the earth's gravity, the deeper the water, the greater the density, the closer the distance between the molecules, the greater the repulsion; The density of the water surface is relatively small, the distance between the molecules is relatively far, the molecules attract each other, and people lying on the water surface will be squeezed by the front and back, left and right and below to float, which is called the tension of water, the higher the density, the smaller the liquid tension.

Only one molecule in the liquid is attracted by other molecules around it, and it is sold in the same direction in all directions. The gravitational attraction of the molecules on the surface of the liquid is much smaller than that of the inner layer of the liquid molecules, so that the surface of the liquid tends to be sucked into the interior of the liquid, and this inward gravity makes the liquid surface shrink as much as possible to form surface tension. Therefore, surface tension is defined as a unit length.

The force exerted within the surface. It is measured in dyn cm. In the SI system of units, ERG CM2= MJ M2= MN M.S

As everyone knows, the surface tension decreases with increasing temperature, and its value is zero in the critical state. When tr= is used, the following relationship is commonly used:

Water has a force that causes the surface area to shrink, and this force is called surface tension. When the surface tension is greater than the weight of the object on the water, the object floats on the water. For example:

Dropping water on a lotus leaf will form water droplets. The droplets dripping from the faucet will be in a circular shape. This is all due to surface tension.

And chemically look at every kind of object.

Layer by layer from the inside out.

Each molecule is distributed due to electron clusters.

There is an e-charge

But it will be neutralizedto the outermost layer.

It's against different substances.

So there is the formation of suction or resistance. The --- called surface tension must occur on different surfaces. For example, between water and air.

The forces in the water cancel each other.

Between water and air due to different substances.

There is tension in the formation - 73dye cm

To put it simply. Take water as an example. Surface tension of water: The attraction of the surfaces between molecules to each other.

So to speak. You'll notice a drop of water on top of a substance that doesn't absorb water.

Water is droplets that do not dissolve. This is due to the surface tension of the water. I don't understand anymore.

When you eat apples.

Wash the apples. Since the surface of the apple is a waxy layer.

The water will have a drop of water on the surface. The surface tension of the oil is also very high. When you use a test tube, in any transparent container.

You will find that the oil is not flat.

It is convex because the surface tension of the oil molecules is greater than that of glass.

The surface energy is the non-volumetric work that must be done to the substance by reversibly increasing the surface area of the object under the condition of constant temperature, constant pressure and constant composition. Another definition of surface energy is the excess energy of a surface particle relative to an internal particle.

The force that causes the surface of a liquid to shrink is called surface tension. The force between two adjacent parts of a liquid surface that pull each other over a unit length. The direction of the surface tension is tangent to the liquid surface and perpendicular to the dividing line between the two parts, and if the liquid surface is a plane, the surface tension is on this plane.

If the liquid surface is a curved surface, the surface tension group nuclear reed is on the slice of this surface.