The Combustion of Hydrogen in the Presence of Excess Oxygen

question 31

Multiple Choice

The combustion of hydrogen in the presence of excess oxygen yields water: 2H₂(g) + O₂(g) → 2H₂O (l)
The value of ΔS° for this reaction is ________ J/K ∙ mol.

• A)+405.5
• B)-405.5
• C)-326.3
• D)-265.7
• E)+265.7

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Definitions:

Predetermined Overhead Rate

A rate used to allocate manufacturing overhead costs to products, calculated before the accounting period begins based on estimated costs and activity levels.

Factory Overhead

Indirect costs associated with manufacturing, excluding direct materials and direct labor, such as maintenance, utilities, and depreciation.

Production Orders

Refers to written instructions or authorization for the manufacturing of specific quantities of a product, often detailing specifications and schedules.

Period Costs

Expenses that are not directly tied to the production of goods and are expensed in the period they are incurred.