Hydration effect on urea-non-electrolyte enthalpic pair interaction coefficients. Dissolution enthalpies of urea in aqueous solution of alkoxyethanols at 298.15 K

Effect of base–acid properties of the mixtures of water with methanol on the solution enthalpy of selected cyclic ethers in this mixture at 298.15 K

“…The enthalpy of solution of cyclic ethers in the watermethanol (W?MeOH) mixtures was performed at (298.15 ± 0.01) K using an ''isoperibol''-type calorimeter as described in the literature [42]. The calorimeter was verified on the basis of the standard enthalpy of solution of urea and KCl (Calorimetric standard US, NBS) in water at (298.15 ± 0.01) K [43,44] as was described in our recent publication [45].…”

Thermochemistry of interactions of Na+ with benzo-15-crown-5 ether in acetonitrile-water mixtures at 298.15 K

“…All measurements were performed at 298.15 K, with an 'isoperibol' type calorimeter as described in our earlier report [17]. The uncertainities in the measured enthalpies did not exceed _+0.7% of the measured value.…”

Complex formation of crown ethers with cations in the (water+organic solvent) mixtures: Part IX. Thermodynamics of interactions of Na+ ion with benzo-15-crown-5 ether in {(1−x)DMA+xH2O} at T=298.15 K

“…The solution enthalpy of B15C5 in {(1 À x)DMA + xH 2 O} + NaI system was measured using ''isoperibol'' type calorimeter at T = (298.15 ± 0.005) K as described in earlier report [18]. The calorimeter was calibrated on the basis of the standard enthalpy of solution at the infinite dilution of urea (Calorimetric standard US, NBS) in water at T = 298.15 K. The value obtained from 10 measurements in this study was (15.30 ± 0.07) kJ AE mol À1 (literature data 15.31 kJ AE mol À1 [19], 15.28 kJ AE mol À1 [20]).…”