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A mixture of hydrazine, hydrogen and Cu(...

A mixture of hydrazine, hydrogen and Cu(II) catalyst is used as rocked fuel. Why?

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In the presence of `Cu(II)` catalyst, hydrogen peroxide hydraine `(NH_(2)-NH_(2))` to nitrogen. The reaction is highly exothermic and in accompanied by large increasein volume. Therefore, the mixture provides an upward and thrust and is used to a rocket fuel.
`NH_(2)-NH_(2)(l)+2H_(2)O_(2)(l) underset("Heat")overset("Cu(II)")to N_(2)(g)+4H_(2)O(g)+"heat"`
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