The Langmuir isotherm assumes that adsorption occurs at specific sites on the su

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Question: The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What does this imply? (2020)

Options:

Correct Answer: Adsorption is monolayered.

Solution:

The Langmuir isotherm assumes that adsorption occurs at specific sites, leading to a monolayer coverage of the adsorbate.

The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What does this imply? (2020)

The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What does this imply? (2020)

Step 1: Understand that adsorption is the process where molecules stick to a surface.
Step 2: The Langmuir isotherm model suggests that there are specific spots on a surface where these molecules can attach.
Step 3: Each of these specific spots can hold only one molecule at a time, meaning that no two molecules can occupy the same spot.
Step 4: Because of this, the model predicts that the surface will eventually become fully covered with molecules, forming a single layer, known as a monolayer.
Step 5: This implies that once all the specific sites are filled, no more molecules can attach to the surface.

Langmuir Isotherm – The Langmuir isotherm describes the adsorption of molecules onto a solid surface, assuming that adsorption occurs at specific, uniform sites leading to a maximum of one layer of adsorbate.
Monolayer Coverage – The implication of the Langmuir isotherm is that once all specific sites are occupied, no further adsorption can occur, resulting in a monolayer of adsorbate.