The water activity was evaluated in 39 mixtures of water with 1-propoxypropan-2-ol (1-pp-2-ol) at T = 298.15 K using an indirect method which measures the system capacitance. A careful calibration of the apparatus and the many measurements in the water very-rich region have enabled the determination of activity coefficients of 1-pp-2-ol using the Gibbs Duhem equation, the system being modelled using a 6-suffix Margules equation. Infinite dilution activity coefficients for the two components are presented together with their associated uncertainties. Excessmolar Gibbs free energieswereestimated and compared with literature values for the aqueous system of 2-butoxyethanol, which is a structural isomer of 1-pp-2-ol
Compounds
#
Formula
Name
1
C6H14O2
1-propoxy-2-propanol
2
H2O
water
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
2
(Relative) activity - 2 ; Liquid
Mole fraction - 1; Liquid
Pressure, kPa; Liquid
Temperature, K; Liquid
Liquid
humidity indicator HygroLab 3 - change in electrostatic capacity