However, the radiation that fills the vacuum has a different temperature than the kinetic temperature of the gas, meaning that the gas and radiation are not in thermodynamic equilibrium.
2.
Accordingly, as energy is removed from molecules, both their kinetic temperature ( the temperature derived from the kinetic energy of translational motion ) and their internal temperature simultaneously diminish in equal proportions.
3.
Collisions establish a Maxwell Boltzmann distribution of velocities, and the'temperature'normally used to describe interstellar gas is the'kinetic temperature', which describes the temperature at which the particles would have the observed Maxwell Boltzmann velocity distribution in thermodynamic equilibrium.
4.
Since the internal temperature of molecules are usually equal to their kinetic temperature, the distinction is usually of interest only in the detailed study of non-local thermodynamic equilibrium ( LTE ) phenomena such as combustion, the sublimation of solids, and the diffusion of hot gases in a partial vacuum.
5.
These simple movements in the three " x ", " y ", and " z " axis dimensions of space means the particles move in the three spatial " translational degrees of freedom ( e . g ., motion along the x, y, and z axes ), the translational kinetic energy is related to the kinetic temperature by:
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