The Nitrogen-Hydrogen Systems

The reaction of nitrogen and hydrogen in a plasma gives ammonia, the decomposition of which produces hydrazine. 

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PHASE EQUILIBRIUM OF THE NITROGEN-HYDROGEN SYSTEM IN THE CRITICAL REGION OF HYDROGEN... 

With the use of our analysis apparatus which could detect a condensable impurity in hydrogen down to 0.5 ppm, we could not find any measurable solubility of oxygen in liquid hydrogen. Conditions for these tests were identical with those for the nitrogen-hydrogen system. 

The second reason applies to the nitrogen, hydrogen, and ammonia mixture at 25°C. Because the molecules involved have strong chemical bonds, mixtures of N2, H2, and NH3 at 25°C can exist with no apparent change over long periods of time. However, under appropriate conditions the system does reach equilibrium, as shown in Fig. 6.5. Note that because of the reaction stoichiometry, H2 disappears three times as fast as N2 does, and NH3 forms twice as fast as N2 disappears. 

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