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Copyright © 2008 by Eni Generalic
Calc4Chem - www.periodni.com
PHYSICAL CONSTANTS
Absolute zero
-273.15 °C
Acceleration of free fall, standard
9.80665 m/s
2
Atomic mass unit
1.6605402×10
-27
kg
Avogadro constant
6.0221367×10
23
1/mol
Base of natural logarithms
2.718281828
Boltzmann constant
1.380658×10
-23
J/K
Classical electron radius
2.81794092×10
-15
m
Electron mass
9.1093897×10
-31
kg
Electron-proton mass ratio
5.44617013×10
-4
Electronvolt
1.6021892×10
-19
J
Elementary charge
1.60217733×10
-19
C
Faraday constant
96485.309 C/mol
First radiation constant
3.7417749×10
-16
W m
2
Molar gas constant
8.314510 J/mol K
Molar volume
(Ideal gas,
T
= 273.15 K,
p
= 101.325 kPa)
0.02241410 m
3
/mol
Newtonian constant of gravitation
6.67259×10
-11
N m
2
/kg
2
Permeability of vacuum
12.566370614×10
-7
N/A
2
Permittivity of vacuum
8.854187817×10
-12
F/m
PI
3.1415926535897932
Planck constants
6.6260755×10
-34
J s
Second radiation constant
0.01438769 m K
Solar constant
1400 W/m
2
Speed of light in vacuum
299792458 m/s
Speed of sound in air at STP
340 m/s
Standard pressure
101325 Pa