Doctoral Dissertations

Abstract

"Measurements of the condensation coefficient of CO₂ and H₂O have been made using a molecular beam and quartz crystal microbalances. The dependence of the condensation coefficient on variables such as population density on the substrate, temperature of the substrate, molecular beam intensity and temperature of the molecular beam, was investigated. The results are explained using heterogeneous nucleation theory for low density population, and a new approach for high density population is presented. The rate of sublimation of these two gases was measured directly. The results are reported in terms of vapor pressure in the range 10⁻⁹ to 10⁻⁴ Torr. The spatial distribution of reflected and sublimated CO₂ and H₂O molecules is found to follow the diffuse cosine law"--Abstract, page ii.

Advisor(s)

James, William Joseph
Levenson, L. L., 1928-1998

Committee Member(s)

Roach, D. Vincent
Bertrand, Gary L.
Robertson, B. Ken

Department(s)

Chemistry

Degree Name

Ph. D. in Chemistry

Sponsor(s)

National Science Foundation (U.S.)

Publisher

University of Missouri--Rolla

Publication Date

1972

Pagination

ix, 84 pages

Note about bibliography

Includes bibliographical references (pages 81-83)

Rights

© 1972 Victor Cazcarra, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Sublimation (Chemistry) -- Measurement
Microbalances
Condensation
Materials at low temperatures
Molecular beams

Thesis Number

T 2762

Print OCLC #

6034253

Electronic OCLC #

893626284

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Chemistry Commons

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