Atmos. Chem. Phys. Discuss., 11, 7535-7553, 2011
www.atmos-chem-phys-discuss.net/11/7535/2011/
doi:10.5194/acpd-11-7535-2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Technical Note: Estimating fusion properties for polyacids
S. Compernolle, K. Ceulemans, and J.-F. Müller
Belgian Institute for Space-aeronomy, Ringlaan 3, 1180 Brussels, Belgium

Abstract. Organic aerosol (OA) components are generally assumed to be liquid-like. Hence, to describe the partitioning of these components, the liquid vapor pressure of these components is desired. Polyacids and functionalized polyacids can be a significant part of OA. But often, measurements are available only for solid state vapor pressure, which can differ by orders of magnitude from their liquid counterparts. To convert such a sublimation pressure to a subcooled liquid vapor pressure, fusion properties (two out of these three quantities: fusion enthalpy, fusion entropy, fusion temperature) are required. Unfortunately, experimental knowledge of fusion properties is sometimes missing in part or totally, hence an estimation method is required. Several fusion data estimation methods are tested here against experimental data of polyacids. Next, we develop a simple estimation method, specifically for this kind of compounds, reducing significantly the estimation error.

Citation: Compernolle, S., Ceulemans, K., and Müller, J.-F.: Technical Note: Estimating fusion properties for polyacids, Atmos. Chem. Phys. Discuss., 11, 7535-7553, doi:10.5194/acpd-11-7535-2011, 2011.
 
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