# Reaction of Hydrogen and Dinitrogen Tetroxide?

What might be the possible products of a reaction between hydrogen and dinitrogen tetroxide ($\ce{N2O4}$)? They are fuel and oxidizer respectively in rockets.

• And what do you think they are? – Mithoron Dec 28 '15 at 20:04
• I have no Idea. – user24174 Dec 28 '15 at 20:07
• In future please try to have any idea, otherwise question can be downvoted and/or closed. – Mithoron Dec 28 '15 at 20:57

A likely reaction between dinitrogen tetroxide and hydrogen would be as follows with nitrogen and water being the products

$\ce{N2O4 + 4H2 → N2 + 4H2O~(I)}$

$\ce{\Delta H_{rxn}=[0+(4 x -241$.$8)-9$.$2 - (4 x 0)] ~=~ -976$.$4~ kJ}$

For the record, dinitrogen tetroxide and hydrazine (usually in combination with methylated hydrazines) is currently used as a rocket fuel. The equation describing this reaction is

$\ce{N2O4 + 2N2H4 → 3N2 + 4H2O~(II)}$

$\ce{\Delta H_{rxn}=[(3 x 0) +(4~ x ~-241$.$8) - 9$.$2 - (2 x 50$.$6)] ~=~ -1077$.$6~ kJ}$

• are traces of NOx possible in either case? – user24174 Dec 28 '15 at 20:14
• Sure, $\ce{N2O4}$ can produce $\ce{NO}$ directly. – ron Dec 28 '15 at 20:24
• @F.Sherrif or redissociates into $\ce{NO2}$. – Jan Dec 28 '15 at 22:29