Science Constants - Constant, Absolute Entropy Symbol: S0/R Value: -1.1517048(44)  -1.1648678(44)  Category: - Physico-Chemical Constants Description: Given by 5/2 + ln [(2πmukT1/h2)(3/2)kT1/p0] The first value quoted is for T1=1K and p0=100kPa, while the second value is for T1=1K and p0=101.325kPa.