Masters Theses


"Studies of the intermolecular forces and potential energy functions have been largely of a theoretical nature. Various empirical statements representing these theories have been developed and tested. Of these, the Lennard-Jones (6-12) potential is one of the more realistic and has become the most favored when dealing with non-polar molecules.

The values of these “force constants” or the values of the Lennard-Jones (6-12) potential parameters, have been determined from both diffusion and viscosity data. Although these “force constants” can be determined from diffusional measurements as well as viscosity data, the literature is predominately filled with values of force constants which were determined from viscosity measurements. Until recently, there has been little diffusional data reported over a sufficient temperature range to evaluate force constants for gas pairs. Recent work has indicated that the values of the force constants, when determined from diffusion and viscosity data, are not in good agreement.

Much viscosity data are obtained under dynamic or flow conditions at pressures exceeding atmospheric.

The purpose of this investigation was to evaluate the force constants of certain selected non-polar gases at atmospheric pressure from viscosity data obtained using a rolling ball viscometer. It was believed that the force constants, evaluated from viscosity measurements in this manner, would be more nearly comparable with those calculated from diffusional data and hence, would be in better agreement. The gases used in this investigation were air, argon, carbon dioxide and helium"--Introduction, pages 1-2.


Strunk, Mailand R., 1919-2008

Committee Member(s)

Schoen, Richard I.
Sutherland, Richard Orlin
Fuller, Harold Q., 1907-1996


Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering


Missouri School of Mines and Metallurgy

Publication Date



xi, 120 pages

Note about bibliography

Includes bibliographical references (pages 114-117).


© 1959 Charles Warren Keller, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Intermolecular forces
Viscoelasticity -- Measurement

Thesis Number

T 1200

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