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Uptake of nopinone by water: Comparison between aqueous‐and gas‐phase oxidation of organic compounds in the atmosphere
Author(s) -
Nozière B.,
Longfellow C. A.,
Henry B. E.,
Voisin D.,
Hanson D. R.
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl012663
Subject(s) - aqueous solution , henry's law , atmosphere (unit) , solubility , solvation , analytical chemistry (journal) , phase (matter) , aqueous two phase system , enthalpy , chemistry , thermodynamics , environmental chemistry , ion , organic chemistry , physics
The uptake of nopinone by liquid water at room temperature has been studied in a wetted‐wall reactor coupled to a chemical ionization mass spectrometer and was found to be reversible and bulk‐specific. A Henry's law constant of H(296±3 K)=(176±50) Matm −1 was obtained. Measuring the solubility using a bubble column technique resulted in a value of H(296±1 K)=(200 ±40) Matm −1 . We recommend an average value of H(296±2 K)=(195±60) Matm −1 . The temperature dependence of this coefficient has been measured between 274 and 298 K and corresponds to an enthalpy of solvation of Δ soln H=− (98±30) kJ/mol. The Henry's law coefficients measured in this work are large enough that, in the presence of clouds, aqueous‐phase sinks of nopinone might compete with its gas‐phase sinks. The possibility of such competition for other organic compounds in the atmosphere is discussed.