Osmotic and activity coefficients of aqueous (NH{sub 4}){sub 2}SO{sub 4} as a function of temperature, and aqueous (NH{sub 4}){sub 2}SO{sub 4}-H{sub 2}SO{sub 4} mixtures at 298.15 K and 323.15 K

Journal Article · Wed May 01 04:00:00 EDT 1996 · Journal of Chemical and Engineering Data

DOI:https://doi.org/10.1021/je950289d· OSTI ID:256891

Clegg, S L ^[1]; Milioto, S; Palmer, D A ^[2]

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1. Univ. of East Anglia, Norwich (United Kingdom). School of Environmental Sciences
2. Oak Ridge National Lab., TN (United States). Chemical and Analytical Sciences Div.

Aqueous (NH{sub 4}){sub 2}SO{sub 4} and (NH{sub 4}){sub 2}SO{sub 4}-H{sub 2}SO{sub 4} mixtures are important components of atmospheric aerosols and an understanding of their thermodynamic properties is needed to predict aerosol formation and behavior. Osmotic coefficients of (NH{sub 4}){sub 2}SO{sub 4(aq)}, and aqueous (NH{sub 4}){sub 2}SO{sub 4}-H{sub 2}SO{sub 4} mixtures at 298.15 K and 323.15 K, and H{sub 2}SO{sub 4(aq)} at 323.15 K have been determined by an isopiestic method. Using the Pitzer molality-based thermodynamic model, the measurements are combined with other literature data to obtain osmotic and activity coefficients of, first, (NH{sub 4}){sub 2}SO{sub 4(aq)} from <273 K to {approximately}373 K and, second, aqueous (NH{sub 4}){sub 2}SO{sub 4}-H{sub 2}SO{sub 4} over the entire composition range at 298.15 K.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 256891
• Journal Information: Journal of Chemical and Engineering Data, Journal Name: Journal of Chemical and Engineering Data Journal Issue: 3 Vol. 41; ISSN JCEAAX; ISSN 0021-9568
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AMMONIUM SULFATES
CONCENTRATION RATIO
ENVIRONMENTAL TRANSPORT
OSMOSIS
SULFURIC ACID
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES