Home > Community > The reaction between hydrazine (N2H4) and dinitrogen tetroxide (N2O4) in liquid forms is used to propel rockets into the air. Assume a standard condition. 2N2H4 (l) + N2O4 (l) → 3N2 (g) + 4H2O (g). Is the reaction spontaneous or non spontaneous?
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Nadine Abu Omar

The reaction between hydrazine (N2H4) and dinitrogen tetroxide (N2O4) in liquid forms is used to propel rockets into the air. Assume a standard condition. 2N2H4 (l) + N2O4 (l) → 3N2 (g) + 4H2O (g). Is the reaction spontaneous or non spontaneous?

If the oxidizer and fuel react on contact the the resulting pair is called *”hypergolic”* in rocket fuel terms. A common hypergolic pairing was RFNA (red fuming nitric acid) and toluidine (neat or mixed with kerosine or/and aniline. My company did EPA haz waste testing for RFNA and UDMH (unsymmetrical di methyl hydrazine) at retired Nike missile silos.

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David Levy  Follow

hydrazine and dinitrogen tetroxide are hypergolic. When they come together, they ignite spontaneously.

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