When all molecules have enough energy to move, they achieve a state known as thermal equilibrium, where they can freely translate, rotate, and vibrate. This increased energy typically leads to a rise in temperature, as the kinetic energy of the molecules increases. In solids, this can cause the material to soften or melt, while in liquids and gases, it can result in a phase change or increased pressure if contained. Ultimately, the system reaches a dynamic state where molecular motion is constant and uniform.
When you add kinetic energy to a solid the molecules won't move
Like all molecules, a molecule of H20 is in constant motion; 'hot' molecules move faster than 'cold' molecules. If the molecules move slowly enough the substance appears stationary to us (frozen water) and if they move quickly enough they will expand to fill their container (vapor or gas water.)
Of course, because kinetic energy of molecules is directly proportional to temperature.
The particles move faster. Thermal energy is a measure of kinetic energy of molecules.
When enough energy is supplied, the rigid pattern of molecules is disrupted in a phase change, causing the molecules to move more freely. This disrupts the orderly arrangement of the particles and changes the physical state of the substance.
The faster a molecule moves, that hotter it becomes. If water becomes hot enough, it evaporates into steam.
In a liquid, the molecules have enough kinetic energy to move freely over each other.
they spread apart and move faster when energy is added.
When you add kinetic energy to a solid the molecules won't move
the atoms use the energy to move the molecules
They move faster because the heat gives them more energy
Like all molecules, a molecule of H20 is in constant motion; 'hot' molecules move faster than 'cold' molecules. If the molecules move slowly enough the substance appears stationary to us (frozen water) and if they move quickly enough they will expand to fill their container (vapor or gas water.)
As water is heated, the water molecules gain kinetic energy and they move faster. Eventually, they get enough kinetic energy to move fast enough to escape the liquid phase and become a gas/vapor. This is the boiling point.
Of course, because kinetic energy of molecules is directly proportional to temperature.
The liquid cools down. Its molecules move more slowly.
The particles move faster. Thermal energy is a measure of kinetic energy of molecules.
When a solid is melted, the molecules gain enough energy to overcome the forces holding them together in a rigid structure. As a result, the molecules move more freely and take on a more disordered arrangement, transitioning from a solid to a liquid state.