text: Sieverts' law can be readily rationalized by considering the reaction of dissolution of the gas in the metal, which involves dissociation of the molecule of the gas.  For example, for nitrogen:
  : N (molecular gas)  2 N (dissolved atoms)
  For the above reaction, the equilibrium constant is
  where:
  : c is the concentration of the dissolved atoms into the metal (in the case above, atomic nitrogen N),
  : p is the partial pressure of the gas at the interface with the metal (in the case above, the molecular nitrogen N).
  Therefore,