| Numéro |
J. Phys. IV France
Volume 04, Numéro C7, Juillet 1994
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique |
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|---|---|---|
| Page(s) | C7-503 - C7-506 | |
| DOI | https://doi.org/10.1051/jp4:19947118 | |
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-503-C7-506
DOI: 10.1051/jp4:19947118
Institute of Physical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
© EDP Sciences 1994
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-503-C7-506
DOI: 10.1051/jp4:19947118
Energetics and dynamics of H bonds in carboxylic acids studied by resonant photoacoustic spectroscopy
A. Winkler and P. HessInstitute of Physical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
Abstract
Dissociation rates of dimeric formic (methanoic)-, acetic (ethanoic)- and propionic acid in the gas phase were measured over the pressure range 0.01-100 mbar and for temperatures between 290 K and 325 K. Standing acoustic waves in a cylindrical cavity were excited by absorption of amplitude-modulated CO2-laser radiation. Consistent sets of kinetic and thermodynamic properties of the dimer/monomer mixture were obtained from the parameters of the first radial acoustic resonances of the acoustic resonator.
© EDP Sciences 1994