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Copyright c 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
1.6605402x10
-27
kg
Avogadro constant
6.0221367x10
23
1/mol
Base of natural logarithms
2.718281828
Boltzmann constant
1.380658x10
-23
J/K
Classical electron radius
2.81794092x10
-15
m
Electron mass
9.1093897x10
-31
kg
Electron-proton mass ratio
5.44617013x10
-4
Electronvolt
1.6021892x10
-19
J
Elementary charge
1.60217733x10
-19
C
Faraday constant
96485.309 C/mol
First radiation constant
3.7417749x10
-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
6.67259x10
-11
N m
2
/kg
2
Permeability of vacuum
12.566370614x10
-7
N/A
2
Permittivity of vacuum
8.854187817x10
-12
F/m
PI
3.1415926535897932
Planck constants
6.6260755x10
-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