Thermodynamic temperature Thermodynamic temperature is a measurement of the average kinetic energy of particles (atoms or molecules) in a system, and it is related to the absolute temperature scale, which is measured in Kelvin (K). It is a fundamental thermodynamic property that is used to characterize the behavior of materials and systems under different situations. Temperature is defined in thermodynamics as the quantity that is proportional to the internal energy of a system in equilibrium. The Kelvin scale is the most generally used scale for measuring thermodynamic temperature. It is defined so that absolute zero (the theoretical temperature at which all matter has zero entropy) equates to 0 Kelvin (K). Because it has no negative values, the Kelvin scale is sometimes known as the absolute temperature scale. Thermodynamic temperature is used in numerous areas of research and engineering, including physics, chemistry, materials science, and thermodynamics. It is a fun...