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Useful Information - 59-240 Introductory Physical Chemisty SI Units Base quantity Name Symbol Useful Information - 59-240 Introductory Physical Chemisty
SI Units
Base quantity
Name
Symbol
length meter m
mass
kilogram
kg
time second
s
electric current
ampere
A
thermodynamic temperature kelvin
K
amount of substance
mole
mol
SI Derived Units
Derived quantity
Name
Symbol
volume cubic
meter
m
3

speed, velocity
meter per second
m/s
acceleration
m. per s. squared
m/s
2
or m s
-2
wave number
reciprocal meter
m
-1

mass density
kg per cubic m
kg/m
3
or kg m
-3
frequency
hertz
Hz : s
-1

force
newton
N : kg·m·s
- 2

pressure, stress
pascal
Pa : N/m
2
: kg·m
-1
·s
-2
energy, work, heat
joule
J : N·m : kg·m
2
·s
-2

power, radiant flux
watt
W : J/s : kg·m
2
·s
-3

electric charge
coulomb
C : A·s
electric potential, emf
volt
V : W/A : kg·m
2
·s
-3
·A
-1

R with different units
8.31451 J
K
-1
mol
-1
8.20578 x 10
-2

L atm K
-1
mol
-1
8.31451 x 10
-2
L bar K
-1
mol
-1
8.31451
Pa m
3
K
-1
mol
-1
62.364
L Torr K
-1
mol
-1
1.98722
cal K
-1
mol
-1
Units of pressure:
Name
Symbol
Value
pascal
1 Pa
1 N m
-2
, 1 kg m
-1
s
-2
bar
1 bar
10
5
Pa
atmosphere
1 atm
101325 Pa
torr
1 Torr
101325/760 Pa = 133.32 Pa
mm of mercury
1 mm Hg
133.322 Pa
pound per sq inch
1 psi
6.894 757 kPa