Sackur–Tetrode constant

https://doi.org/10.1351/goldbook.S05442
Fundamental physical constant representing the translational contribution to molar entropy; \(\frac{S_{0}}{R} = -1.151\ 693(21)\) at \(1\ \rm{K}\) and standard pressure of \(100\ \rm{kPa}\), where \(R\) is the gas constant.
Source:
CODATA Bull. 1986, 63, 1 [Terms] [Book]