Abstract
Differential and integral molar entropies of the adsorbed layer are calculated from the dependence of the coverage on pressure and temperature published in part I. The experimental entropies correspond up to coverages of 2 × 10 14 molecules cm −2 with entropies of the localized adsorption and an additional vibration entropy of about 20 cal deg −1 mole −1 caused by vibrations of the adsorbed atoms in the order of magnitude of 10 12 sec −1. At higher coverages the entropy increases and passes through a maximum. This is explained by the formation of a second adsorption state (γ state) probably consisting of molecular hydrogen.
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