How to explain evaporation heat dissipation in terms of the motion of molecules?

The molecules of the liquid are also in constant motion, and the molecular movement intensifies after the layer of molecules on the surface absorbs heat. Detachment from the attraction of liquid molecules. At the same time, there will be gas molecules entering the liquid molecules, when the number of molecules that are separated is greater than the number of molecules that enter.

This is evaporation. Absorbing heat causes the surroundings to heat down. The velocity of the air allows the evaporated molecules to leave the liquid, so that the number of molecules entering the liquid is reduced, which is equivalent to an increase in evaporation, and the larger the surface area of the liquid, the more molecules on the surface.

The more molecules are likely to absorb heat to escape the liquid, and the higher the temperature, the easier it is for the molecules to get enough energy to get out of the liquid surface. That's about it.

Why does evaporation dissipate heat?

Because the liquid vaporizes into gas, it needs to lower its own temperature, and it will dissipate heat. How does it evaporate?

As long as a liquid with volatile properties is exposed to air, it will evaporate Why does it lower the temperature of oneself or the surrounding objects?

Because when it evaporates, it dissipates heat, which lowers its own temperature.

Why are air velocity, liquid surface area, and temperature factors that determine how fast or slow evaporation is?

When water molecules flow into the air, they follow the air, so the faster the air flows, the faster the water will evaporate.

The larger the surface area of the liquid, the more water molecules will flow and the faster it will evaporate.

The specific heat capacity of water is the largest, and when the temperature rises, it absorbs more heat, and the higher the temperature that needs to be released, the faster the evaporation rate.

Different in nature:

1. Diffusion phenomenon: Fiber annihilation is the phenomenon of the transfer of material molecules from the high concentration area to the low concentration area until it is evenly distributed.

2. Molecular thermal motion: Objects are composed of molecules, atoms and ions (water is composed of molecules, iron is composed of atoms, salt is composed of ions), and the molecules of all substances are in constant motion, and it is irregular motion.

The phenomenon of molecular thermal transport and diffusion is defined differently:

The so-called diffusion phenomenon refers to the phenomenon that different substances can enter each other when they come into contact with each other.

Thermal motion of molecules: The molecules of all substances are constantly doing irregular motion, and this irregular motion is called the thermal motion of molecules.

1. The higher the temperature, the faster the molecular thermal movement and the faster the liquid evaporates.

The larger the surface area, the more opportunities there are for liquid molecules to escape the solution and the faster the liquid will evaporate.

2.You probably don't mean experimentation.

The average relative molecular mass of air is 29, and gases with a relative molecular mass greater than 29 are denser than air, and vice versa.

For example, carbon dioxide has a relative molecular mass of 44 and is denser than air, so it can be collected by the upward air exhaust method.

Ammonia has a relative molecular weight of 17 and is less dense than air.

The root cause and essence of water evaporation is the movement of molecules.

Reasons that affect the rate of water evaporation:

1.The temperature of the water, because the higher the temperature, the more intense the water molecules move and the faster the evaporation.

2.The surface area of water, because the larger the surface area, the greater the ability of water molecules to break free.

3.The speed at which the air flows around the water, because the faster the air around it, the greater the evaporation.

Molecular Kinematics Molecular kinematics is a theory that expounds the laws of thermal phenomena from the microstructure of matter, for example, it clarifies that the temperature of a gas is a sign of the kinetic energy of the average translational front of the molecule, and that the collision of a large number of gas molecules on the wall of the vessel produces pressure on the wall of the container. In addition, it preliminarily reveals the nature of gas diffusion, heat transfer and viscosity phenomena, and explains many of the experimental laws of gases, and the achievement of molecular motion theory promotes the further development of statistical physics.

The microstructure of matter has three main points: All objects are made up of a large number of molecules, and there are gaps between the molecules, and the molecules are in a state of non-stop, irregular motion, and this kind of motion is called thermal motion, and there are interacting gravitational and repulsive forces between molecules

The basic content of the theory of molecular motion is that an object is composed of a large number of molecules, the molecules are never stopping to do irregular motion, and there is an interaction force between the molecules. The irregular motion of a large number of molecules is called the thermal motion of molecules.

In fact, there are many kinds of units that make up matter, either atoms (metals), ions (salts), or molecules (organic matter).In thermodynamics, these particles are collectively referred to as molecules because they follow the same laws when they do thermal motion.

Numerous objective facts (e.g., Brownian motion, diffusion phenomena, etc.) prove the correctness of the theory of molecular motion, which can explain the structure and characteristics of various substances, as well as all thermal phenomena, and relate the macroscopic phenomena and microscopic nature of matter