Question: Hydrazine, N2H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the process in which hydrazine is formed from

Hydrazine, N2H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the process in which hydrazine is formed from its elements?
N2(g) + 2H2(g) †’ N2H4(l)
Use the following reactions and enthalpy changes:

N2H4(I) + 02(g)--N2(g) + 2H20(1): -622.2 kJ H2(g) + 102(g)--H20(1); -;-285.8 kJ

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