From: physics. nist. gov/constants Fundamental Physical Constants-Complete listing Relative std molar planck constant NAh3990312689(30)×10-10Jsmo-17.6×10-9 NAhc0.11962656492(91) J m mol 7.6×10 molar gas constant 8.314472(15) Jmol-1K-11.7×10-6 Boltzmann constant R/NA k 1.3806503(24)×10-23JK-1 1.7×10 8.617342(15)×10 k/h2.0836644536)×1010HzK-1 1.7×10 k/hc69.50356(12) molar volume of ideal gas RT/p T=273.15K,p=101.325kPa 22413996(39)×10 mol-1 1.7×10 Loschmidt constant NA/Vm 268677747×1025 1.7×1 T=273.15K,p=100kPa 22710981(40)×10-3 m3mol-11.7×10-6 Sackur- Tetrode constant (absolute entropy constant)h +In((muktI/h2)3/kTi/pol T1=1K 100 kPa So/R 1.1517048(44) 3.8×10° p0=101.325kPa -1.1648678(44 3.7×10 Stefan-Boltzmann constant (x2/60)k4/hc2 5670400(40)×10-8 Wm-2K-47.0×10-6 7.8×10 first radiation constant for spectral radiance 2hc2 CIL 1. 191042722(93)x 10-16 Wm2 sr-1 7. x 10-8 second radiation constant hc/k 14387752(25)×10-2mK 1.7×10- Wien displacement law constant b=λmaxT=c2/4.965114231 28977686(51)×10-3 7×10 See the " Adopted values" table for the conventional value adopted internationally for realizing representations of the volt using the Joseph son effect b See the"Adopted values"table for the conventional value adopted internationally for realizing representations of the ohm using the quantum Hall effect. Value recommended by the Particle Data Group, Caso et al., Eur. Phys. J. C3(1-4),1-794(1998) d Based on the ratio of the masses of the w and Z bosons mw/mz recommended by the Particle Data Group( Caso et al, 1998). The value for sin-ow they recommend, which is based on a particular variant of the modified minimal subtraction(MS)scheme, is sin-0w (Mz)=0.231 24(24) e The helion, symbol h, is the nucleus of the He atom f This and all other values involving mr are based on the value of mrc2 in Mev recommended by the Particle Data Group, Caso et al., Eur. Phys J. C 3(1-4), 1-794(1998), but with a standard uncertainty of 0. 29 MeV rather than the quoted uncertainty of-0 26 Mev,+0. 29 Me. g The numerical value of F to be used in coulometric chemical measurements is 96485.3432(76)[7. x 10-8]when the relevant current is measured in terms of representations of the volt and ohm based on the Josephson and quantum Hall effects and the internationally adopted conventional values of the Josephson and von Klitzing constants KJ-go and RK-g0 given in the"Adopted values" table h The entropy of an ideal monoatomic gas of relative atomic mass Ar is given by S=So+,R In Ar-R In(p/po)+3R In(T/K) Page 7 Journal of Physical and Chemical Reference Data, Vol. 28, No. 6, 1999 and Reviews of Modern Physics, Vol. 72, No. 2, 2000From: physics.nist.gov/constants Fundamental Physical Constants — Complete Listing Relative std. Quantity Symbol Value Unit uncert. ur molar Planck constant NAh 3.990 312 689(30) × 10−10 J s mol−1 7.6 × 10−9 NAhc 0.119 626 56492(91) J m mol−1 7.6 × 10−9 molar gas constant R 8.314 472(15) J mol−1 K−1 1.7 × 10−6 Boltzmann constant R/NA k 1.380 6503(24) × 10−23 J K−1 1.7 × 10−6 in eV K−1 8.617 342(15) × 10−5 eV K−1 1.7 × 10−6 k/h 2.083 6644(36) × 1010 Hz K−1 1.7 × 10−6 k/hc 69.503 56(12) m−1 K−1 1.7 × 10−6 molar volume of ideal gas RT/p T = 273.15 K, p = 101.325 kPa Vm 22.413 996(39) × 10−3 m3 mol−1 1.7 × 10−6 Loschmidt constant NA/Vm n0 2.686 7775(47) × 1025 m−3 1.7 × 10−6 T = 273.15 K, p = 100 kPa Vm 22.710 981(40) × 10−3 m3 mol−1 1.7 × 10−6 Sackur-Tetrode constant (absolute entropy constant)h 5 2 + ln[(2πmukT1/h2)3/2kT1/p0] T1 = 1 K, p0 = 100 kPa S0/R −1.151 7048(44) 3.8 × 10−6 T1 = 1 K, p0 = 101.325 kPa −1.164 8678(44) 3.7 × 10−6 Stefan-Boltzmann constant (π2/60)k4 /3c2 σ 5.670 400(40) × 10−8 W m−2 K−4 7.0 × 10−6 first radiation constant 2πhc2 c1 3.741 771 07(29)× 10−16 W m2 7.8 × 10−8 first radiation constant for spectral radiance 2hc2 c1L 1.191 042 722(93) × 10−16 W m2 sr−1 7.8 × 10−8 second radiation constant hc/k c2 1.438 7752(25) × 10−2 mK 1.7 × 10−6 Wien displacement law constant b = λmaxT = c2/4.965 114 231... b 2.897 7686(51) × 10−3 mK 1.7 × 10−6 a See the “Adopted values” table for the conventional value adopted internationally for realizing representations of the volt using the Joseph￾son effect. b See the “Adopted values” table for the conventional value adopted internationally for realizing representations of the ohm using the quantum Hall effect. c Value recommended by the Particle Data Group, Caso et al., Eur. Phys. J. C 3(1-4), 1-794 (1998). d Based on the ratio of the masses of the W and Z bosons mW/mZ recommended by the Particle Data Group (Caso et al., 1998). The value for sin2θW they recommend, which is based on a particular variant of the modified minimal subtraction (MS) scheme, is sin2θˆ W(MZ) = 0.231 24(24). e The helion, symbol h, is the nucleus of the 3He atom. f This and all other values involving mτ are based on the value of mτ c2 in MeV recommended by the Particle Data Group, Caso et al., Eur. Phys. J. C 3(1-4), 1-794 (1998), but with a standard uncertainty of 0.29 MeV rather than the quoted uncertainty of −0.26 MeV, +0.29 MeV. g The numerical value of F to be used in coulometric chemical measurements is 96 485.3432(76) [7.9×10−8] when the relevant current is measured in terms of representations of the volt and ohm based on the Josephson and quantum Hall effects and the internationally adopted conventional values of the Josephson and von Klitzing constants KJ−90 and RK−90 given in the “Adopted values” table. h The entropy of an ideal monoatomic gas of relative atomic mass Ar is given by S = S0 + 3 2 R ln Ar − R ln(p/p0) + 5 2 R ln(T/K). Page 7 Source: Peter J. Mohr and Barry N. Taylor, CODATA Recommended Values of the Fundamental Physical Constants: 1998, Journal of Physical and Chemical Reference Data, Vol. 28, No. 6, 1999 and Reviews of Modern Physics, Vol. 72, No. 2, 2000