This is an "absolute" scale because it is the measure of the fundamental property of temperature: its zero value, or absolute zero, is the lowest possible temperature. There is nothing that can have a temperature below absolute zero. The absolute zero of the thermodynamic temperature, transformed in the Celsius scale would be equal to 273,5ºC. This characteristic is defined by the third law of thermodynamics in which theoretically no element can have a temperature below 0 K.
The temperature of a quiescent body is a measure of the mean of the kinetic energy of the translational, vibrational and rotational movements of the components of the particles of matter, such as molecules, atoms and subatomic particles (neutrons, protons, and Electrons). The complete variety of these kinetic motions, together with the potential energies of the particles and also, occasionally, other types of energy of the particles in equilibrium with them constitute the total internal energy of a substance. The internal energy is also vaguely called heat energy or thermal energy in conditions where there is no work.
Last review: August 28, 2017Back