Environmental Engineering Reference
In-Depth Information
R
gas constant (N A k B )
R
radius of curvature
S
entropy
S i
phase separation of component i
s
molar entropy/entropy per mole
t
time
T
temperature
U
internal energy
u
molar internal energy
u
velocity
V
volume
W
work
w
work per mole
v
molar volume
x i
mole fraction
x i
mole fraction in the liquid phase
y i
mole fraction in the gas phase
Greek symbols
α
ideal separation factor
β
reciprocal temperature 1/k B T
Γ
thermodynamic factor
γ
surface tension
ε
void fraction
η
Carnot effi ciency
θ
fractional occupancy
θ
stage cut
θ
contact angle
κ
solubility
Λ
Thermal de Broglie wavelength
λ
heat transfer coeffi cient
µ i
chemical potential component i
µ
viscosity
ρ
density (number of molecules per unit volume)
σ
Stefan-Boltzmann constant
σ
adsorption constant
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