heat transfer.
The motion of molecules creates heat energy because as molecules move faster, they collide with each other and transfer energy in the form of heat. This movement and collision of molecules generate heat energy, making it a form of energy.
In hot water the water molecules are moving at a faster rate than they move in cold water. The faster moving molecules hit the salt molecules with greater force and knock them away from the other salt molecules faster. That way the salt molecules dissolve in the water quicker.
Hydrogen atoms are smaller and lighter than oxygen and carbon atoms, making them move faster and diffuse more quickly. Additionally, hydrogen gas molecules exhibit greater kinetic energy and collisions with other molecules, which contributes to their faster diffusion rate compared to oxygen and carbon.
The hotter it is the faster the molecules will move away from each other
Atoms comprising a molecule move faster as heat increases.
molecules are constantly rolling around each other, yet staying mostly in contact, when they are hot molecules move around faster and bump into each other.
If you have the same volume of both then there are in cold water more molecules.
When a liquid or gas is heated, the molecules move faster, bump into each other, and spread apart. Because the molecules are spread apart, they take up more space. They are less dense. The opposite occurs when a liquid or gas is cooled.
When fast moving molecules touch other molecules, it is called a collision. These collisions can lead to the transfer of energy and changes in the motion or state of the molecules involved.
sound moves through solids quickly because the molecules in a solid are closer together than in liquids or gasses and sound is just molecules bumping into each other. this allows the molecules to bump into each other faster and you hear the sound faster because of this. :)
Bromine diffuses faster in a vacuum because there are no other molecules present to impede its movement. Without other molecules to collide with, bromine atoms can move more freely and cover a larger distance in a shorter amount of time. This lack of obstacles allows bromine to spread out more quickly compared to when it is in a medium with other molecules.
Water molecules in a cup of hot soup will move faster than water molecules in a glass of iced lemonade. The higher temperature of the hot soup provides more energy to the water molecules, causing them to move faster.