Experimental study of the density and derived partial molar volumes of complex ternary water+1-propanol+Li2SO4 mixtures at temperatures from (303 to 448) K and pressures up to 40 MPa
Abdulagatov, I. M., Akhmedova-Azizova, L. A., Azizov, N. D.
Densities of complex ternary water+1-propanol+Li2SO4 mixtures have been measured over the temperature range from (303 to 448) K and at pressures up to 40 MPa using the constant-volume piezometer immersed in a precision liquid thermostat. The measurements were performed for nine samples with concentrations of Li2SO4 from (0.00623 to 0.0274) mole fraction and concentrations of 1-propanol from (0.01553 to 0.05024) mole fraction. In thi2s work the mole fraction of 1-propanol is given in the electrolyte (Li2SO4)-free solution. The combined expanded uncertainty of the density, pressure, temperature, and concentration measurements at the 95 % confidence level with a coverage factor of k = 2 is estimated to be 0.06 %, 0.05 %, 20 mK, and 0.015 %, respectively. Measured values of density for ternary mixtures were used to calculate partial molar volumes of alcohol (1-propanol) and salt (Li2SO4). The temperature and pressure dependences of the partial molar volumes were studied. The concentration dependences of the partial molar volumes were extrapolated to zero concentration (x_1 to 0 in alcohol dilute mixture and x_2 to 0 salt dilute mixture) to yield the partial molar volumes of alcohol and salt at infinite dilutions.
Compounds
#
Formula
Name
1
C3H8O
propan-1-ol
2
Li2O4S
lithium sulfate
3
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.