Question:
The correct assumption(s) required to derive Langmuir adsorption isotherm is/are
The correct assumption(s) required to derive Langmuir adsorption isotherm is/are
Updated On: Jan 11, 2025
- Adsorption is limited to a monolayer on adsorbing surface
All binding sites on adsorbing surface are identical.
- Adsorption of a molecule on a site enhances binding of other molecules on neighboring sites
- Rate of adsorption and rate of desorption are equal at equilibrium.
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The Correct Option is A, B, D
Solution and Explanation
- (A) This assumption is correct. Langmuir adsorption model assumes that adsorption occurs in a single monolayer, meaning only one molecule adsorbs at each site.
- (B) This is also correct. Langmuir model assumes that all adsorption sites are identical and have the same energy of adsorption.
- (C) This assumption is incorrect. Langmuir adsorption model assumes that adsorption on one site does not affect adsorption on neighboring sites (no interaction between adsorbed molecules).
- (D) This is correct. At equilibrium, the rate of adsorption equals the rate of desorption in the Langmuir adsorption model.
Thus, the correct answers are (A), (B), and (D)
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