| Number: | 140/9/97 |
|---|---|
| Start: | 01 January 1997 |
| End: | 31 December 2000 |
Remarks: Of interest to I.2, I.5, and VI.
Larger Project resubmitted and undertaken as 2000-013-1-100
The aim is to collect, critically review and evaluate thermodynamic properties of inorganic and organic free radicals involved in combustion and atmospheric chemical processes. The evaluation will outline the present status of the knowledge of the heats of formation and other thermodynamic properties of free radicals. Initially, effort will be concentrated on those key radicals for which different experimental methods lead to consensus values. Subsequently, the project will address the properties of free radicals for which no consensus has been reached. Free radicals are the driving forces of atmospheric chemistry; they initiate the processes leading to tropospheric pollution and stratospheric ozone depletion. Chemical kinetics data bases used in modeling atmospheric chemistry require evaluated thermodynamic data as critical input parameters. These data are themselves usually derived from kinetics measurements in the form of bond strengths or equilibrium constants. The proposed new project is thus an adjunct to ongoing kinetics data evaluation projects. It will provide data to those projects, and use data from those projects. Because of the international scope and importance of atmospheric chemistry, the project requires an international panel of experts for its execution.