Hydrazine,N₂H₄,is a Liquid Used as a Rocket Fuel $\to$ N₂(g)+ 2 H₂O( )
the Reaction of 6

question 42

Multiple Choice

Hydrazine,N₂H₄,is a liquid used as a rocket fuel.It reacts with oxygen to yield nitrogen gas and water.

N₂H₄( ) + O₂(g) $\to$ N₂(g) + 2 H₂O( )
The reaction of 6.50 g N₂H₄ evolves 126.2 kJ of heat.Calculate the enthalpy change per mole of hydrazine combusted.

• A) -19.4 kJ/mol
• B) -25.6 kJ/mol
• C) -126 kJ/mol
• D) -622 kJ/mol
• E) -820.kJ/mol

---

Definitions:

Psychoanalysis

A therapeutic technique and theory of psychology developed by Sigmund Freud, emphasizing unconscious motivations and conflicts as determinants of human behavior.

Psychiatrist

A medical doctor specializing in the diagnosis, treatment, and prevention of mental, emotional, and behavioral disorders.

Hallucinations

Perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, often related to visual, auditory, or other sensory experiences.

Delusions

Strongly held false beliefs not influenced by rational argument or evidence, often symptomatic of psychiatric disorders.