The vapor pressures of supercooled HNO 3 /H 2 O solutions | Zendy

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The vapor pressures of supercooled HNO 3 /H 2 O solutions

Author(s) -

Hanson David R.

Publication year - 1990

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/gl017i004p00421

Subject(s) - nitric acid , supercooling , mole fraction , vapor pressure , thermodynamics , stratosphere , analytical chemistry (journal) , chemistry , materials science , inorganic chemistry , meteorology , organic chemistry , physics

A procedure utilizing the Gibbs‐Duhem relation is used to extrapolate vapor pressures of supercooled HNO 3 mixtures to 190 K. Values of A and B from the equation logP = A − B/T are presented for nitric acid solutions between 0.20 and 0.25 mole fraction HNO 3 . In the stratosphere, if sufficient HNO 3 vapor is present because it has not come into equilibrium with the nitric acid trihydrate, supercooled nitric acid solutions could condense at temperatures up to 1.5 ±0.8 K above the ice point.

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