Abstract
The freezing point of mixtures of H2 16O with H2 17O was measured as a function of the molal concentration. The freezing points rose linearly with increasing molal concentration above that of pure ordinary water, H2 16O, at 273.15 K. This confirms Kiyosawa's previous conclusion [K. Kiyosawa, J. Solution Chem. 20, 583 (1991).], drawn from findings on changes in the freezing point of mixtures of H2 16O with H2 18O or D2 16O that even a difference in the number of neutrons in the hydrogen or oxygen atoms of water molecules makes them behave as different entities with respect to the colligative properties of solutions. This has been confirmed to also occur in mixtures of H2 16O with H2 17O.
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Kiyosawa, K. Freezing Point of Mixtures of H2 16O with H2 17O and Those of Aqueous CD3CH2OH and CH3 13CH2OH Solutions. Journal of Solution Chemistry 33, 323–328 (2004). https://doi.org/10.1023/B:JOSL.0000036303.28871.ac
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DOI: https://doi.org/10.1023/B:JOSL.0000036303.28871.ac