User:Frode54/list_of_quantity_concepts_of_substance References

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Symbol	Description	Relation	SI Units	other units
$b_{i}$	molality of component i	$b_{i}=n_{i}/m_{solvent}$	mol/kg	mol/g
$c_{i}$	molar concentration of component i, also called amount concentration (chemistry)	$c_{i}=n_{i}/V_{t}$	mol/cm³
$C_{i}$	number concentration of component i	$C_{i}=N_{i}/V_{t}=\rho _{Ni}$	1/cm³
$E$	viscosity scaling parameter using ideal gas		Da^1/2K^-1/6bar^2/3
$E_{z}$	viscosity scaling parameter using real gas		Da^1/2K^-1/6bar^2/3
$EOS$	equation of state
$k_{B}$	Boltzmann constant 1.380 648 52(79) x 10^-23		J/K
$l$	mean free path		nm
$M$	molar mass	$M=M_{u}\cdot M_{r}$	g/mol
$m_{a}$	atomic mass		Da or u
$m_{i}$	mass of component i		kg/m³
$M_{r}$	relative molar mass		Da or u
${\overline {M}}_{rm}$	mass weighted relative molar mass		Da or u
${\overline {M}}_{rn}$	mole weighted relative molar mass		Da or u
$M_{u}$	molar mass constant with value 1 g/mol		g/mol
$MW$	molecular weight	$MW=M_{r}$	Da or u
$n,n_{t}$	total amount of substance in volume $V_{t}$	$n=n_{t}=n_{l}+n_{g}$	mol	mol
$n_{p}$	amount of substance in volume $V_{p}$ of phase p = l,g		mol	mol
$N,N_{t}$	total number of molecules in volume $V_{t}$	$N=N_{t}=N_{l}+N_{g}$	1	1
$N_{p}$	number of molecules in volume $V_{p}$ of phase p = l,g		1	1
$N$	total number of countable objects in volume $V_{t}$ (generally)		1	1
$N_{A}$	Avogadro number 6.022 140 857 (74) x 10²³		mol^-1
$P$	pressure		Pa	bar, atm
$r_{0}$	molecular radius, particle radius or hard core radius		nm
$R$	gas constant or Regnault constant 8.314 459 8(48)	$R=k_{B}N_{A}$	JK^-1mol^-1
$r_{i}$	mole ratio of component i (chemistry)	$r_{i}=n_{i}/\left(n_{t}-n_{i}\right)$	mol/mol	ppm, ppb, ppt
$SG$	specific gravity or relative mass density		1
$T$	temperature		K
$u$	fluid velocity in x-direction		m/s
${\bar {v}}$	average molecular velocity in equilibrium state		m/s
$v_{p}$	most probable molecular velocity in equilibrium state		m/s
$V_{t}$	volume		m³, L or cm³
$V$	molar volume	$V=V_{t}/n$	cm³/mol
$w_{i}$	mass fraction (chemistry)	$w_{i}=m_{ti}/m_{t}$	kg/kg, g/g	g/g, ppm, ppb, ppt
$x_{i}$	mole fraction of component i in liquid phase (physics)	$x_{i}=n_{li}/n_{l}$	mol/mol	mol/mol
$x_{i}$	mole fraction of component i (chemistry)	$x_{i}=n_{ti}/n_{t}$	mol/mol	ppm, ppb, ppt
$y_{i}$	mole fraction of component i in gas phase	$y_{i}=n_{gi}/n_{g}$	mol/mol	mol/mol
$Z$	compressibility factor		1
$z_{i}$	mole fraction of fluid component i	$z_{i}=n_{ti}/n_{t}$	mol/mol
	Greek letters
$\alpha$	rotational coupling coefficient		1
$\eta$	viscosity		cP or Pa.s
$\Phi$	number flux of molecules (molecular flux)		cm^-2
$\phi _{i}$	volume concentration of component i (chemistry)	$\phi _{i}=V_{ti}/V_{t}$	m³/m³	cm³/cm³, L/L
$\omega$	Pitzer's acentric facor		1	1
$\rho$	volume specific amount molar density		mole/cm³
$\rho _{i}$	mass concentration of component i mass density	$m_{i}=n_{i}/V_{t}$ )	kg/m³, g/L
$\rho _{N}$	number density	$\rho _{N}=C$	1/m³
$\sigma$	microscopic collision cross section		m²
$\xi$	viscosity reducing parameter; reciprocal of E	$\xi =E^{-1}$	Da^-1/2K^1/6bar^-2/3
$\zeta _{i}$	mass ratio of component i (chemistry)	$\zeta _{i}=m_{i}/(m_{t}-m_{i})$	kg/kg	g/g, ppm, ppb, ppt
	Subscripts and superscripts
c	critical state
ccs	collision cross section
C7+	hydrocarbons with 7 and more carbon atoms
dg	low pressure gas or dilute gas
eos	equation of state
g	gas phase index
i,j	fluid component index
l	liquid phase index
m	mass weighted average
mix	mixture
n	mole weighted average
o	reference fluid methane or reference state
p	fluid phase index (physics)
p	most probable value (physics) (also denoted m - most likely)
r	relative
r	reduced (scaled) state
ref	reference substance or state
t	total

See also