Group adsorption energies.additivity determination

Thus, the determination of Qi and Ci values on the basis of measurements carried out at ordinary temperatures in these cases becomes difii-cult. In such cases, however, one can approximately estimate the additional contribution of the energy of specific interaction arising from TT-bonds or the functional groups at a somewhat higher a—e.g., when values of a correspond to 1 molecule per cavity. AQspecific is determined by subtracting the heat of adsorption of the reference molecule (incapable to specific interaction) from the heat of adsorption of the specifically adsorbed molecule 10, 28S0). Both molecules must have similar geometry, close values of polarizability and of heat of adsorption on nonspecific adsorbent (6). 

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