In the Langmuir adsorption isotherm, which assumption is NOT made? (2019)

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Question: In the Langmuir adsorption isotherm, which assumption is NOT made? (2019)

Options:

Correct Answer: Adsorption occurs only at high pressures

Exam Year: 2019

Solution:

The Langmuir isotherm assumes that adsorption occurs at all pressures, not just high pressures.

In the Langmuir adsorption isotherm, which assumption is NOT made? (2019)

In the Langmuir adsorption isotherm, which assumption is NOT made? (2019)

Step 1: Understand what the Langmuir adsorption isotherm is. It describes how molecules stick to a surface.
Step 2: Know that the Langmuir model makes certain assumptions about how adsorption happens.
Step 3: One key assumption of the Langmuir isotherm is that adsorption can occur at all pressures, not just when the pressure is high.
Step 4: Identify the question: it asks which assumption is NOT made in the Langmuir isotherm.
Step 5: Conclude that the assumption about adsorption occurring at all pressures is indeed made, so it is NOT the answer to the question.

Langmuir Adsorption Isotherm – A model that describes the adsorption of molecules onto a solid surface, assuming a fixed number of adsorption sites and that each site can hold only one molecule.
Assumptions of Langmuir Isotherm – Key assumptions include that adsorption occurs at specific sites, no interactions between adsorbed molecules, and that the surface is homogenous.