Abstract
1. The thermodynamics of adsorption was considered for the case when the equilibrium gas phase is sharply nonideal, and it was shown, in particular, that in this region it is advisable to use not the values of the heats of adsorption, but the values of the partial molar enthalpies as the energy characteristic of the adsorbed substance. 2. The isosteric heats of adsorption were determined in the xenon-NaX zeolite system as a function of the value of the adsorption and temperature. The partial molar enthalpies and partial molar isosteric heat capacities of xenon in this system were calculated. 3. The partial molar isosteric heat capacity of the adsorbate increases with increasing temperature. The dependence of the differential molar heat of adsorption on the temperature is due to the difference between the isosteric heat capacities of the gas phase and the adsorbed substance.
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