In the Reaction Below, ΔH°_f Is Zero for ________

question 62

Multiple Choice

In the reaction below, ΔH°_f is zero for ________. Ni (s) + 2CO (g) + 2PF₃ (g) → Ni(CO) ₂(PF₃) ₂ (l)

• A)Ni (s)
• B)CO (g)
• C)F₃ (g)
• D)Ni(CO)₂(PF₃)₂ (l)
• E)both CO (g)and PF₃ (g)

---

Definitions:

Heavy Machinery

Large and heavy equipment and machinery used in industries such as construction, mining, and manufacturing for tasks requiring significant power and force.

Excavation

The process of digging up earth, soil, or rock, often used in archeology or construction to uncover structures or artifacts.

Contract Price

The total amount agreed upon in a contract for the sale of goods or services.

Call for Tenders

A formal request issued by a business or government for suppliers to submit proposals to undertake a specified project or service.