Read Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927

Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927

Massachusetts Institute of Technology

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Description:Excerpt from Publications From the Massachusetts Institute of Technology: January, 1927 In a recent theory of adsorption due to Langmuir,7 use is made of the hypothesis that the adsorbed molecule is held by either the primary valence forces or the residual valence forces of the atoms composing the adsorbing surface. At the surface of a piece of charcoal, for example, one of the primary bonds of each carbon atom would be unsaturated or at any rate partially free to exert an in uence and one adsorbable atom or molecule would be bound for each surface carbon atom. Adsorption, therefore, Langmuir suggests, involves one layer only. On the other hand there is indication that very many layers of molecules must be attached in certain instances where substances are taken up by solids. Langmuir assumes in the latter cases that the material is condensed in the capillary spaces and only those molecules constituting the first layer are to be referred to as adsorbed. This layer, moreover, is to be con sidered as chemically or quasi-chemically united to the surface atoms of the adsorbent. It may be supposed, however, that if, for example, oxygen molecules (or atoms) are attached to the surface carbon atoms by Virtue Of even secondary valence forces, the molecules, as such, will be in a special state of valence strain such as to enable this first layer to constitute of itself an adsorbing surface for a second layer of molecules of the same or of a different species. The state of valence strain in the second layer might, Of course, be less in degree than for the first layer, but still conceivably su icient to adsorb a third layer and succeeding layers similarly, until finally a layer was held attached in which the state of the molecules differed but little from the free state. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927. To get started finding Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927, you are right to find our website which has a comprehensive collection of manuals listed.
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Description: Excerpt from Publications From the Massachusetts Institute of Technology: January, 1927 In a recent theory of adsorption due to Langmuir,7 use is made of the hypothesis that the adsorbed molecule is held by either the primary valence forces or the residual valence forces of the atoms composing the adsorbing surface. At the surface of a piece of charcoal, for example, one of the primary bonds of each carbon atom would be unsaturated or at any rate partially free to exert an in uence and one adsorbable atom or molecule would be bound for each surface carbon atom. Adsorption, therefore, Langmuir suggests, involves one layer only. On the other hand there is indication that very many layers of molecules must be attached in certain instances where substances are taken up by solids. Langmuir assumes in the latter cases that the material is condensed in the capillary spaces and only those molecules constituting the first layer are to be referred to as adsorbed. This layer, moreover, is to be con sidered as chemically or quasi-chemically united to the surface atoms of the adsorbent. It may be supposed, however, that if, for example, oxygen molecules (or atoms) are attached to the surface carbon atoms by Virtue Of even secondary valence forces, the molecules, as such, will be in a special state of valence strain such as to enable this first layer to constitute of itself an adsorbing surface for a second layer of molecules of the same or of a different species. The state of valence strain in the second layer might, Of course, be less in degree than for the first layer, but still conceivably su icient to adsorb a third layer and succeeding layers similarly, until finally a layer was held attached in which the state of the molecules differed but little from the free state. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927. To get started finding Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927, you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.

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Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927

Publications From the Massachusetts Institute of Technology (Classic Reprint): January, 1927

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