ISOTOPE EFFECTS ON APPARENT AND PARTIAL MOLAR. VOLUMES OFHCl, LiCl, AND NaCI MEASURED IN H_2O AND D_2O FROM 250 °C TO 350 AND 14 MPa TO 19 MPa

摘要

Apparent molar volumes have been measured for solutions of HCl (DCl),LiCl,and NaCl in H_2O and D_2O over the temperature range T =250 °C to T= 350 °C and p = 14 MPa to p = 19 MPa using a high-temperature, high-pressure vibrating tube densimeter in the molality range 0.05 < m < 3.50 mol kg~(-1). The experimental results have been represented using an extended Debye-Huckel equation to describe the molality dependence of the apparent molar volumes. The Born model and Krichevskii model have been used to describe solvent isotope effects. The results will contribute to developing models for predicting pD under CANDU reactor primary coolant conditions.