Physical Constants

Page Numbers of Some
Important Tables
Bond Energies
619
Electron Configurations of the Elements
567
Ionization Constants of
Acids and Bases
245, 258, 262, A22, A23
Reduction Potentials
480, A24
Solubility Products
331, A23
Thermodynamic Data
A19–A22
Vapor Pressures of Water
824
Physical Constants
Constant
Symbol
Value
Atomic mass unit
amu
1.66054  1027 kg
Avogadro’s number
N
6.02214  1023 mol1
Bohr radius
a0
5.292  1011 m
Boltzmann’s constant
k
1.38066  1023 J K1
Charge of an electron
e
1.60218  1019 C
Faraday’s constant
F
96,485 C mol1
Gas constant
R
8.31451 J K1 mol1
0.08206 L atm K1 mol1
Mass of an electron
me
9.10939  1031 kg
5.48580  104 amu
Mass of a neutron
mn
1.67493  1027 kg
Mass of a proton
mp
1.67262  1027 kg
Planck’s constant
h
6.62608  1034 J s
Speed of light
c
2.99792458  108 m s1
1.00866 amu
1.00728 amu
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SI Units and Conversion Factors
Length
Mass
SI unit: meter (m)
SI unit: kilogram (kg)
1 meter
 1.0936 yards
1 centimeter  0.39370 inch
1 inch
 2.54 centimeters
(exactly)
1 kilometer  0.62137 mile
1 mile
 5280 feet
 1.6093 kilometers
1 angstrom  1010 meter
 100 picometers
1 kilogram
1 pound
1 ton
1 metric ton
1 atomic
mass unit
Volume
1 liter
1 gallon
1 quart
 10 m
 1 dm3
 1.0567 quarts
 4 quarts
 8 pints
 3.7854 liters
 32 fluid ounces
 0.94633 liter
3
Energy
SI unit: kelvin (K)
0 K
K
C
F
 273.15C
 459.67F
 C  273.15
5
 (F  32)
9
9
 (C)  32
5
Pressure
SI unit: joule (J)
1 joule
 1 kg m s
 0.23901 calorie
 9.4781  104 btu
(British thermal unit)
1 calorie
 4.184 joules
 3.965  103 btu
1 btu
 1055.06 joules
 252.2 calories
2
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 1.66054  1027 kilograms
Temperature
SI unit: cubic meter (m3)
3
 1000 grams
 2.2046 pounds
 453.59 grams
 0.45359 kilogram
 16 ounces
 2000 pounds
 907.185 kilograms
 1000 kilograms
 2204.6 pounds
2
SI unit: pascal (Pa)
1 pascal
 1 N m2
 1 kg m1 s2
1 atmosphere  101.325 kilopascals
 760 torr (mm Hg)
 14.70 pounds per
square inch
1 bar
 105 pascals
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