The "Standard Molar Entropy" is the entropy content of one mole of substance, under standard conditions (not standard temperature and pressure STP).
Applicable units are those of quantitykind:MolarEntropy
http://en.wikipedia.org/wiki/Standard_molar_entropy
The "Standard Molar Entropy" is the entropy content of one mole of substance, under standard conditions (not standard temperature and pressure STP).
$S_m = \frac{S}{n}$, where $S$ is entropy and $n$ is amount of substance.
http://www.iso.org/iso/catalogue_detail?csnumber=31894