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Change in the Infra-Red Absorption Spectrum of Water with Temperature

Change in the Infra-Red Absorption Spectrum of Water with Temperature By the use of two constant deviation spectrometers in series and a Coblentz linear thermopile, the absorption coefficient of water was measured for various temperatures from 0° to 95°C. The bands found showed maximum absorption at the following wave-lengths at 0°C: .775 .... .985 1.21 1.45 1.96 μ at 95°C: .74 .845 .97 1.17 1.43 1.94 μ There is a shift toward shorter wave-lengths as the temperature increases and also a marked increase in magnitude of the maximum absorption for the bands at.77,.98 and 1.21 μ . These changes are qualitatively explained by Roentgen's hypothesis that water is a mixture of at least two kinds of molecules, presumably ( H 2 O ) 2 and ( H 2 O ) 3 , whose relative amounts change with a change of temperature. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review American Physical Society (APS)

Change in the Infra-Red Absorption Spectrum of Water with Temperature

Collins, J. R
Physical Review , Volume 26 (6) – Dec 1, 1925
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Publisher
American Physical Society (APS)
Copyright
Copyright © 1925 The American Physical Society
ISSN
1536-6065
DOI
10.1103/PhysRev.26.771
Publisher site
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Abstract

By the use of two constant deviation spectrometers in series and a Coblentz linear thermopile, the absorption coefficient of water was measured for various temperatures from 0° to 95°C. The bands found showed maximum absorption at the following wave-lengths at 0°C: .775 .... .985 1.21 1.45 1.96 μ at 95°C: .74 .845 .97 1.17 1.43 1.94 μ There is a shift toward shorter wave-lengths as the temperature increases and also a marked increase in magnitude of the maximum absorption for the bands at.77,.98 and 1.21 μ . These changes are qualitatively explained by Roentgen's hypothesis that water is a mixture of at least two kinds of molecules, presumably ( H 2 O ) 2 and ( H 2 O ) 3 , whose relative amounts change with a change of temperature.

Journal

Physical Review – American Physical Society (APS)

Published: Dec 1, 1925

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