What Is the Standard Enthalpy of Formation of Liquid Diethylamine,(CH₃CH₂)₂NH

question 29

Multiple Choice

What is the standard enthalpy of formation of liquid diethylamine,(CH₃CH₂) ₂NH?
N₂O₅(g) + 8CH₄(g) → 2(CH₃CH₂) ₂NH(l) + 5H₂O(l) ; ΔH° = -1103 kJ
Substance
ΔH°_f (kJ/mol)
N₂O₅(g)
+11) 3
CH₄(g)
-74) 9
H₂O(l)
-285.8

• A)-131 kJ/mol
• B)-421 kJ/mol
• C)+131 kJ/mol
• D)-1452 kJ/mol
• E)+421 kJ/mol

---

Definitions:

Administrative Privileges

Permissions granted to users allowing them to make critical changes to the system or software, like installing or removing applications.

Enhance Performance

Techniques or actions taken to improve the efficiency and speed of a computer system or software.

Defragment

A process of consolidating fragmented files on a computer's hard disk, improving efficiency and access speed.

Optimize

The process of making something as effective, efficient, or functional as possible, often in the context of software and digital images.