A low temperature adiabatic calorimeter suitable for thermal measurements on adsorbed gases has been developed. Heat capacity values for two amounts of nitrogen adsorbed on titanium dioxide (rutile) are presented. While the measurements were complicated by the appearance of warm drifts in the calorimeter over part of the temperature range when nitrogen was present, it appears that at the concentrations used the adsorbate was present as a condensed phase.
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Morrison et al. (1948) studied this question.
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