4
Physical-chemistry quantity
Symbol
Units
Flow
D
L s
−1
Flux density
J
mol s
−1
m
−2
Frequency
f, ν
Hz, s
−1
Geometric factor
k
m
−1
, cm
−1
Gibbs free energy of formation
Δ f G
J mol
−1
Impedance
Z
Ω
Inductance
L
H
Lattice parameter
a, b, c, α, β, γ
A c
Magnitude of X in standard state
X°
−
Molar heat capacity at constant pressure
C p
J K
−1
mol
−1
Molar mass
M
g mol
−1
Molar volume
V m
m
3
mol
−1
Mole fraction
x
−
Overpotential
η
V
Permittivity
ε
F m
−1
Potential difference
ΔV, ΔE
V
Power
P
W
Power density
P
W cm
−2
Pressure
P
Pa, bar
Relative permittivity
ε r
−
Fractional coverage
θ
−
Resistivity
ρ
Ω cm
Specific energy
W
J kg
−1
, W h kg
−1
Thermal expansion coefficient
α
K
−1
Transport number of species i
t i
−
Solid-State Electrochemistry