Molekültemperatur

Molekültemperatur refers to the average kinetic energy of the molecules within a substance. Temperature, in a macroscopic sense, is a measure of how hot or cold something is. At the microscopic level, this sensation is directly related to the motion of the particles that make up the substance. For gases, molecules move freely and rapidly, colliding with each other and the walls of their container. In liquids, molecules are still in motion but are closer together and their movement is more restricted. Solids have molecules that are held in fixed positions, but they still vibrate. The faster these molecules move or vibrate, the higher the molekültemperatur. This kinetic energy is directly proportional to the absolute temperature, measured in Kelvin. Therefore, as the molekültemperatur increases, the substance becomes hotter. Conversely, as it decreases, the substance cools down. Changes in molekültemperatur are responsible for phenomena like thermal expansion and the transition between states of matter such as melting and boiling.