In What Temperature Range Is ΔG° Greater Than Zero for the Formation

question 4

Multiple Choice

In what temperature range is ΔG° greater than zero for the formation of NH₄Cl(s) from NH₃(g) and HCl(g) ?
NH₃(g) + HCl(g) → NH₄Cl(s)
For the reaction,ΔH° = −176.0 kJ and ΔS° = −0.2845 kJ/K.

• A) The temperature must be greater than 619 K.
• B) The temperature must be less than 619 K.
• C) The temperature must be exactly 619 K.
• D) ΔG° is always greater than zero.
• E) ΔG° is never greater than zero.

---

Definitions:

Legally Binding

An agreement or contract that is enforceable by law, where failure to comply can result in legal consequences.

Ratification

The process by which a constitutional amendment or other legal instrument is officially validated by signatory states or parties.

Commander-In-Chief

The role vested in the president of the United States as the supreme commander of the military forces of the country and of the state National Guard units when they are called into federal service.

Military Matters

Issues, strategies, and operations related to the armed forces and national defense.