The Odd-Even Behaviour of Dicarboxylic Acids Solubility in the Atmospheric Aerosols
2009
Rozaini, Mohd Zul Helmi | Brimblecombe, Peter
The solubility and the enthalpy of dicarboxylic acids have been determined in water at intervals between 278.5 and 543.5 K. At 298.15 K, the values derived were: Δsol H m (m = 1.33 mol kg⁻¹) = 29.80 kJ mol⁻¹for oxalic acid; Δsol H m (m = 16.03 mol kg⁻¹) = 12.82 kJ mol⁻¹ for malonic acid; Δsol H m (m = 0.75 mol kg⁻¹) = 28.20 kJ mol⁻¹ for succinic acid; Δsol H m (m = 8.77 mol kg⁻¹) = 48.01 kJ mol⁻¹ and Δsol H m (m = 0.17 mol kg⁻¹) = 40.30 kJ mol⁻¹ for glutaric and adipic acid respectively. The solubility value exhibits a prominent odd-even effect with respect to terms with even number of carbon atoms with the odd carbon numbers showing much higher solubility. Observations made in the atmospheres suggest that this odd-even effect may have implications for the relative abundance of these acids in aerosols.
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