Which of the Following Shows the Reaction Associated with the Standard

question 109

Multiple Choice

Which of the following shows the reaction associated with the standard heat of formation of a compound?

• A)Ca(s) + C(s,graphite) + O₃ (g) \(\rightarrow\)CaCO₃ (s)
• B)NO₂ (g) + CL₂ (g) \(\rightarrow\) 2 NOCl(g)
• C)N₂ (g) + 2 H₂ (g) \(\rightarrow\) N₂ H₄ (g)
• D)2 H₂ (g) + O₂ (g) \(\rightarrow\) 2 H₂O(l)
• E)Na⁺(aq) + OH ^- aq) \(\rightarrow\)NaOH(s)

---

Definitions:

Direct Materials Price Variance

The difference between the actual cost and the standard cost of direct materials used in production, indicating how effectively the materials budget is being adhered to.

Per-Unit Standards

Estimates of the direct materials, direct labor, and manufacturing overhead costs required to produce one unit of a product.

Direct Labor Price Variance

The difference between the actual cost of direct labor and the expected (or standard) cost of direct labor used during production.

Direct Labor Payroll

The total amount of money paid to employees directly involved in manufacturing products or providing services.