Atkins' Physical Chemistry 11e
Atkins' Physical Chemistry 11e
11th Edition
ISBN: 9780192575135
Author: Peter Atkins; Julio de Paula; James Keeler
Publisher: Oxford University Press Academic UK
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Chapter 19, Problem 19B.1ST
Interpretation Introduction

Interpretation:

For the given data of adsorption of CO on charcoal at 273K the Langmuir isotherm has to be confirmed. The value of α has to be calculated.

Concept Introduction:

The four assumptions in which Langmuir isotherm based on are as follows,

Beyond monolayer coverage the adsorption cannot be proceeded.

The sites on surface are all equivalent.

The adsorption of molecule can occur only at vacant site.

Adsorption probability is independent of neighboring sites occupation.

The relation between surface coverage and pressure in which α with dimension of 1pressure is depicted as follows,

    θ = αp1+αpα = kakd

Here,    θ is fractional coverage and p is partial pressure.

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