Quantity the change in which is equal to the heat brought to the system in a reversible
process at constant temperature divided by that temperature. Entropy is zero for an
ideally ordered crystal at 0
. In statistical thermodynamics
where
is the
Boltzmann constant
and
the number of possible arrangements of the system.
Source:
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2187
PAC, 1996, 68, 957
(Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations
1996))
on page 972
