2. Definitions¶
Residual properties for a given thermodynamic property \(M\) are defined as
where \(M^\text{IG}\) is the value of the property in the ideal gas state and \(M^\text{R}\) is the residual value of the property.
More information on residual properties can be found in standard texts [SVanNessA05]
2.1. Nomenclature¶
Code |
Symbol |
Description |
|---|---|---|
P |
\(P\) |
Pressure in Pa |
V |
\(V\) |
Molar Volume in \(\text{m}^3/\text{mol}\) |
R |
\(R\) |
gas constant SI units (\(\text{m}^3\times\text{Pa}/\text{mol}/\text{K}\)) |
T |
\(T\) |
temperature in K |
T_c |
\(T_\text{c}\) |
critical temperature in K |
P_c |
\(P_\text{c}\) |
critical pressure in Pa |
T_r |
\(T_\text{r}\) |
reduced temperature (dimensionless) |
V_c |
\(V_\text{c}\) |
Critical volume \(\text{m}^3/\text{mol}\) |
w |
\(\omega\) |
Accentric factor |
y_i |
\(y_i\) |
mole fraction of component i |
– |
\(n_i\) |
number of moles of component i |
S |
\(S\) |
Molar entropy |
H |
\(H\) |
Molar enthalpy |
G |
\(G\) |
Molar Gibbs free energy |