What Is Thermal Motion?

Molecular thermal motion refers to the irregular movement of molecules of all substances. The temperature shift affects the thermal motion of the molecules. The higher the temperature, the more intense the thermal motion. There are many examples of molecular thermal movement in life, such as salted eggs and pickles that we eat, because the NaCl molecules continue to move and enter the eggs or vegetables, making them salty.

The irregular motion of a large number of molecules in an object is called thermal motion.

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In some dietary propaganda, there is often some knowledge of diffusion phenomena. For example, a slogan to promote stinky tofu is "notorious, fragrant thousands of miles", which very vividly describes the characteristics of "stinky" and "fragrant" of stinky tofu. Diffusion of fragrance; the description of the wine's mellow taste "is not afraid of the alley", this sentence indirectly proves that this wine is a good wine, showing no matter how deep the alley is, it can not stop the aroma of the wine and float out of the lane Inviting. The wine volatilizes, and the molecules continue to move in the air, so that people far away from the wine can smell it. ^[3]

In the room, strong sunlight hits the house, and we can see the floating dust under the light. This is the gas molecules in the air that constantly move in a windless environment, hitting small particles of dust suspended in the air. As a result, we can see small particles of dust doing irregular movements. ^[3]