- 84 -


Hydrogen Reaction Equations

        1. Molecular dissociation H2   H + H.--The

equilibrium relation between molecular and atomic hydrogen involved in molecular dissociation at absolute temperature T is (39)



     NH N      2H2 mm3k T 3   UH UH   EH 2/kT
        H  - H 1 ___     T3/2   ~   e    2(5.1)
        NH2     mH h2          UH2


where

          mH = atomic weight of H

          mH = atomic weight of H2
          2
          uH = partition function of H UH2 = partition function of H2


        E'   = dissociation energy of H2
          H2

          k = Boltzmann's constant

          h = Planck's constant

The partition function of atomic hydrogen is


               uH =  g. j Xj/kT                   (5.2)
                    J

where

        gj = statistical weight of j-th term Xj = excitation energy of j-th term