Vapor pressures of ethylene glycol, hydroxyacetaldehyde, and hydroxyacetone were measured by using a standard closed system equipped with a vacuum line, built recently in our laboratory. First, our vapor pressures measurements of ethylene glycol and their excellent agreement with the literature in the studied temperature range, that is, (308 to 385) K, permitted us to validate our experimental setup and procedure. The data obtained in the temperature ranges of (296 to 356) K and (273 to 304) K were very satisfactorily (absolute relative deviations (ARD) less than 2.5 %) fitted according to the Antoine s equation: log10(Pdeg hydroxyacetaldehyde/Pa) = 12.96 +- 0.82 - (3657 +- 238)/(T/K) and log10(Pdeg hydroxyacetone/Pa) = 10.13 +- 0.06 - (2201 +- 153)/(T/K). Then, the resulting vapor pressures of both hydroxyacetaldehyde and hydroxyacetone at 293 K were Pdeg = (3.0 +- 0.2) Pa and Pdeg = (415 +- 20) Pa for hydroxyacetaldehyde and hydroxyacetone, respectively. The quoted errors correspond to 2s obtained from the least-squares fit analysis and the estimated systematic relative error of 5 %. Finally, these experimental expressions of temperature dependences of Pdeg then permitted the derivation of the enthalpy of vaporization for both compounds.
Compounds
#
Formula
Name
1
C2H6O2
1,2-ethanediol
2
C3H6O2
acetol
3
C2H4O2
2-hydroxyacetaldehyde
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.