For the Reaction H₂(g) + 1/2 O₂(g) → H₂O(g) ΔH°

question 82

Multiple Choice

For the reaction H₂(g) + 1/2 O₂(g) → H₂O(g) ΔH° = -241.8 kJ/mol, what quantity of heat, in kJ, evolved when a 72.0 g mixture containing equal parts of H₂ and O₂, by mass, is burned?

• A) 8630 kJ
• B) 4860 kJ
• C) 1088 kJ
• D) 272 kJ
• E) 544 kJ

---

Definitions:

Direct Materials Costs

The cost of raw materials that are directly used in the manufacture of a product.

FIFO Method

First-In, First-Out, an inventory valuation method where the first items purchased are the first ones to be removed from inventory.

Units Started and Completed

This term refers to items or products that begin and finish production within a specific accounting period, in the context of manufacturing or process accounting.

Applied Overhead

is an estimate of indirect costs assigned to individual units of production based on a predetermined rate.