A fundamental equation of state in terms of the Helmholtz energy is presented for hydrogen chloride. Any thermodynamic property can be calculated by combinations of its derivatives with respect to the independent variables temperature and density. The present equation of state is applicable in the entire fluid region. Its accuracy is assessed by comparison with the available experimental literature data from the triple point temperature to 480 K and a maximum pressure of 40 MPa. A reasonable extrapolation behavior beyond these temperature and pressure limits is ensured to allow for an application to mixture models. For the development of the present equation of state, speed of sound measurements are carried out in the liquid and dense vapor phases by means of the pulse-echo technique. Because no speed of sound measurements for this fluid are reported in the literature, the present experimental dataset is crucial for the accurate modeling of caloric properties of hydrogen chloride.
Compounds
#
Formula
Name
1
ClH
hydrogen chloride
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
1
Speed of sound, m/s ; Liquid
Temperature, K; Liquid
Liquid
Gas
Pulse-echo method
11
POMD
1
Speed of sound, m/s ; Fluid (supercritical or subcritical phases)
Temperature, K; Fluid (supercritical or subcritical phases)
Pressure, kPa; Fluid (supercritical or subcritical phases)