Common Physical Fundamental Constants:
Angstrom, À = 10-8 cm = 10-10 m
Micrometer =um=10-6 m
nm = 10-9 m= 10 À
Boltzmann constant (R/Na), kB= 1.381 × 10-23 J/K
Electronic charge (F/N.), e= 1.602 x 10-19 C
Avogadro's constant = A = 6.023 x1023 molecules/mole
Faraday constant (F) =96,496 coulomb equiv.-I
Gas constant (R) = 8.314 J/K mole = 1.986 cal/K mole/
Ideal gas law: P V =k T=4.12x 10 -22 J at 298 K (25°C)
Molar gas volume (at normal conditions) = Vm=22.4 x10-3 m°/mol (22.4 L/
mole/)
1 cal=4.184 J
1 erg= 10-1J
1 atm=1.013 × 105 N/m? (Pa)
kT/e=25.7 mV (at 25°C)
Permittivity of free space, e=8.854x 10-12 C2/J/m
eV= 1.6021 x 10-19 J
Kilowatt hour = kWh= 3.6x 10J
Viscosity of water=0.001 N s/m?= 1 centipoise, at 20°C
Dielectric constant of water=80.2 at 20°C
Gravity constant = g=9.81 m/s?
Speed of light = 2.997 x 108 m/s = 300 km/s

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