The vapor pressures of three important fluorinated propanes, 1,1,1,2,3,3,3-heptafluoropropane (HFC- 227ea), 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) and 1,1,1,3,3-pentafluoropropane (HFC-245fa) were measured precisely with an improved experimental system in the temperature range of 234-371 K, 239-398 K and 235-427 K, respectively. The uncertainty of the vapor pressures was estimated to be +-300 Pa. The experimental samples were prepared carefully and analyzed with a gas chromatographic (GC) system and a gas chromatographic coupled with a mass spectrum (GC/MS) system. The effects of impurities on the vapor pressure were also considered to explain the discrepancies between the experimental results and other literature data. Wagner-type vapor pressure equations were correlated from the experimental results for the three fluids. The critical pressure, normal boiling point, triple-point pressure and acentric factor for the three substances were also obtained from the vapor pressure equations.
Compounds
#
Formula
Name
1
C3HF7
1,1,1,2,3,3,3-heptafluoropropane
2
C3H2F6
1,1,1,3,3,3-hexafluoropropane
3
C3H3F5
1,1,1,3,3-pentafluoropropane
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.