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1997
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December
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In the Laboratory
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Carbon Dioxide Dissolution as a Relaxation Process: A Kinetics Experiment for Physical Chemistry
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Peter G. Bowers, Mordecai B. Rubin, Richard M. Noyes, and Dagmar Andueza
Simmons College, Department of Chemistry, 300 The Fenway, Boston, MA 02115
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December 1997
Vol. 74 No. 12
p. 1455
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| Abstract |
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When a closed system consisting of gaseous CO2 in equilibrium with a well-stirred saturated aqueous solution at room temperature is perturbed by removing or adding CO2 gas, the system returns to equilibrium with a characteristic relaxation time of about 20 minutes depending on the apparatus geometry. We describe a simple experiment to measure the kinetics of the relaxation by monitoring the pressure changes above the solution. The dissolution demonstrates all the features of much faster relaxation processes that require costly instrumentation to study, and has the advantage of yielding information about an environmentally and industrially important process, many aspects of which are still poorly understood. In addition, the experiment presents an opportunity to discuss the dynamics of interphase molecular transfer, a topic not usually treated in physical chemistry texts.
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| More Information |
 Citation |
Bowers, Peter G.; Rubin, Mordecai B.; Noyes, Richard M.; Andueza, Dagmar. J. Chem. Educ. 1997 74 1455.
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Keywords |
Physical Chemistry, Laboratory Instruction, Environmental Chemistry, and Kinetics
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History |
Created:
Last Updated: |
July 20, 1999
June 23, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
1997
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December
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1455
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