Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysteresis. In such cases, the desorption equilibrium pressure is ______________ that obtained for adsorption?
Correct answer: A. Lower than
- A. Lower than
- B. Higher than
- C. Same as
- D. Either same or higher than
Explanation
In adsorption hysteresis, capillary or pore-structure effects make desorption occur at a lower equilibrium pressure than adsorption at the corresponding loading. Thus, the desorption pressure is lower.
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