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Modeling of thermodynamic properties of mixed-solvent electrolyte solutions is challenging. Reliable experimental data are essential for any model development and parametrization. In this work, a benchmark database for (water + methanol/ethanol + alkali halide) mixed-solvent electrolyte solutions is presented. The available experimental data of mean ionic activity coefficient (MIAC) and vapor–liquid equilibrium (VLE) are comprehensively collected and critically evaluated for 61 data sets of 23 solutions. The resulting benchmark database includes 1413 data records from 32 data sets for 13 solutions. The evaluated data sets of the relevant aqueous electrolyte solutions are also presented. A consistent E-NRTL model that satisfies the Gibbs–Duhem equation is utilized for analyzing the data, reconciling the MIAC and VLE data. Based on the database, recommended parameters are obtained for the E-NRTL model.

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The vapor pressure of HFO-1234ze(E) (trans-1,3,3,3-tetrafluoropropene) was measured from 235 to 381 K for pressures from 40 to 3493 kPa using a Burnett apparatus. The temperature measurement uncertainty was estimated to be 2.3 mK, and the pressure uncertainty was estimated to be 600 Pa. A Wagner-type equation was used to correlate the vapor pressure of HFO-1234ze(E) based on the experimental data. This vapor equation has five coefficients and correlates the vapor pressure data of this work with a maximum relative deviation of 0.00082.