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Evaporation Kinetics in Short-Chain Alcohols by Optical Interference

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Ian M. Rosbrugh , S. Y. Nishimura and A. M. Nishimura

Department of Chemistry, Westmont College, Santa Barbara, CA 93108-1099

J. Chem. Educ., 2000, 77 (8), p 1047

DOI: 10.1021/ed077p1047

Publication Date (Web): August 1, 2000

Section:

History, Education, and Documentation

Abstract

The evaporation rates of volatile organic liquids may be determined through the observation of optical interference of spatially coincident light that is reflected from the top (air-liquid) and bottom (liquid-surface) of a liquid drop on a glass surface. As an example of what is possible with this technique, the evaporation for a series of short-chain alcohols and acetone was investigated. For 1-propanol, 2-propanol, 2-methyl-1-propanol, and acetone, the kinetics of evaporation was determined to be zero order. For methanol and ethanol, the process was significantly higher than zero order.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Kinetics

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