Volumetric properties of H 2O and D 2O solutions in propylene carbonate at T = (278.15, 288.15, 298.15, 308.15, and 318.15) K under atmospheric pressure

Abstract

Densities of solutions of ordinary (H 2O) and heavy (D 2O) water in propylene carbonate (PC), with solute mole fractions ranging up to 0.026, have been measured with an error of 1.5 × 10 − 5 g cm −3, at T = (278.15, 288.15, 298.15, 308.15, 318.15) K under atmospheric pressure, using a vibrating-tube densimeter. The apparent/partial molar volumes and expansibilities of water isotopologues (down to the infinite dilution) as well as the excess molar volumes of the specified mixtures have been computed. The effects of H/D solute isotope substitution, solute concentration and temperature on the volume-related changes, caused by solvation of water in PC, have been considered. The results suggest that molecular interaction between PC and H 2O or D 2O is to be close to that of water molecules among themselves.