As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches ____________________?
Correct answer: A. That of normal condensation
- A. That of normal condensation
- B. Integral heat of adsorption
- C. Zero
- D. None of these
Explanation
Near complete surface coverage, the additional molecules occupy sites with adsorption energies approaching those of ordinary condensation. Therefore, the differential heat of adsorption approaches the heat of condensation.
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