### thermodynamic equilibrium

**(TE)**
(state of a system with no net heat flows)

**Thermodynamic equilibrium** (**TE**) is the state of a
thermodynamic system (e.g., a gas cloud) such that there
is no net heat flow, e.g., everything in it being the same
temperature.
It is a theoretical state, but is useful in modeling, e.g.,
the limit of "if there were less heat
flow, what conditions would be approached".

Local thermodynamic equilibrium (LTE) is
state where conditions in region(s) within the
system are such that the temperature is virtually
the same as far as a particle or photon
is likely to reach in a single hop.
Given the ease of modeling thermodynamic
equilibrium, presuming LTE can simplify
models such as those for radiative transfer,
making them tractable.

Thermodynamic equilibrium (or local thermodynamic
equilibrium) is the condition that produces
black-body radiation and the internal characteristics
of a black body.

(*physics*)
http://en.wikipedia.org/wiki/Thermodynamic_equilibrium

**Referenced by:**

black body (BB)

black-body radiation

Bose-Einstein statistics

local thermodynamic equilibrium (LTE)

particle

recombination

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