Abstract
Temperature-composition isobars in the palladium-hydrogen system have been measured at a series of seven different pressures chosen such that the resulting data could be analyzed to provide the thermodynamic functions of the dissolved hydrogen atoms at concentrations below 10 −2 atom fraction. Some indication has been found that the partial thermodynamic functions are composition dependent. Since single crystals were used, this effect is not due to the presence of grain boundaries. Both the partial excess entropy and enthalpy increase rapidly with temperature. This behavior has been discussed in terms of several statistical models.
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