9746 H2 CHEMISTRY (2008)
Data Booklet for Chemistry (Advanced Level) TABLES OF CHEMICAL DATA Important values, constants and standards molar gas constant
R
= 8.31 J K" mo!"'
the Faraday constant
F
= 9.65 x 10'C mor'
the Avogadro constant
L
= 6.02
the Planck constant
h
= 6.63 X 10,34 J s
speed of light in a vacuum
c
= 3.00 x 10' m s"
rest mass of proton, : 1-1
mp
= 1.67
X
10,27 kg
rest mass of neutron, ,',11
mn
= 1.67
X
10,27 kg
rest mass of electron, _~e
me
= 9.11
X
10,31 kg
electronic charge
e
=,1.60x lO"'C
molar volume of gas
Vm
= 22.4 dm' mol" at s.l.p.
X
10" mol"
Vm = 24 dm' mol" under room conditions (where s.t.p. is expressed as 101 kPa, approximately, and 273 K (0 째C))
ionic product of water
= 1.00
X
10,14 mol' dm"
(at 298 K 125 째CD specific heat capacity of water
=4.18kJk "K" (= 4.18 J g.9 K")
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