A Kinetic Study of the Recombination Reaction Na + SO₂ + Ar

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Article on a kinetic study of the recombination reaction sodium + sulfur dioxide + argon.

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5 p.

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Shi, Youchun & Marshall, Paul February 1, 1991.

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Article on a kinetic study of the recombination reaction sodium + sulfur dioxide + argon.

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5 p.

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Abstract: The recombination of atomic sodium, Na(3²S), with SO₂ has been investigated at 787 K, in a bath of Ar at pressures from 1.7 to 80 kPa. Na was generated by pulsed excimer laser photolysis of NaI vapor at 308 nm and monitored by time-resolved resonance absorption of the ᴅ lines at 589 nm under pseudo-first-order conditions. The measured pseudo bimolecular rate constants lie in the third-order and falloff regions and were fitted well by using either a Lindemann mechanism or an empirical RRKM expression. The parameters are discussed in the text. The low-pressure limit is about (2.4-2.7) x 10⁻²⁹ cm⁶ molecule⁻² s⁻¹. By use of RRKM theory, combined with a lower limit based on the absence of any observed equilibrium, the Na-SO₂ bond energy is estimated as 190 ± 15 kJ mol⁻¹. Extrapolation to the high-pressure limit yields k∞ ≈ (1-3) x 10⁻¹⁰ cm³ molecule⁻¹ s⁻¹, in accord with a harpoon model for electron transfer to form an ionic adduct.

Reprinted with permission from the Journal of Physical Chemistry. Copyright 1991 American Chemical Society.

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  • Journal of Physical Chemistry, 1991, Washington D.C.: American Chemical Society, pp. 1654-1658

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Publication Information

  • Publication Title: Journal of Physical Chemistry
  • Volume: 95
  • Issue: 4
  • Page Start: 1654
  • Page End: 1658
  • Pages: 5
  • Peer Reviewed: Yes

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  • July 17, 1990

Accepted Date

  • September 25, 1990

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  • February 1, 1991

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  • April 25, 2015, 8:59 p.m.

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Shi, Youchun & Marshall, Paul. A Kinetic Study of the Recombination Reaction Na + SO₂ + Ar, article, February 1, 1991; [Washington, D.C.]. (digital.library.unt.edu/ark:/67531/metadc503254/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.