The results of measurements of the Henry's law constant near infinite dilution are reported for solutions of H-2 in H2O and D-2 in D2O at high temperatures (170 similar to 300 degreesC). The experimental procedure involved the use of a palladium/hydrogen (or deuterium) electrical resistance sensor. Values of K-H(infinity) for H-2-H2O solutions agree closely with published data. Values of K-H(infinity) for D-2-D2O solutions are lower than those for H-2-H2O solutions. With increasing concentrations of H-2 in H2O and D-2 in D2O the Henry's law coefficients decrease. This is attributed to non-ideality in the gas phase. [References: 10]
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