The Standard Molar Enthalpy of Formation of NH₃(g)is -45

question 18

Multiple Choice

The standard molar enthalpy of formation of NH₃(g) is -45.9 kJ/mol.What is the enthalpy change if 9.51 g N₂(g) and 1.96 g H₂(g) react to produce NH₃(g) ?

• A) -10.3 kJ
• B) -20.7 kJ
• C) -29.9 kJ
• D) -43.7 kJ
• E) -65.6 kJ

---

Definitions:

Eardrum

A thin membrane that separates the outer ear from the middle ear and vibrates in response to sound waves, aiding in the process of hearing.

Pinna

The visible part of the ear that resides outside of the head, which plays a role in capturing sound waves and directing them into the ear canal.

Red-Green Color Blindness

A common form of color vision deficiency where individuals have difficulty distinguishing between red and green hues.

Sound Mixer

An electronic device used in sound recording and reproduction to combine sounds from different sources into a single or multiple outputs.