Determine ?H for the Following Reaction, 2NH₃(g)+ 5/2O₂(g)? 2NO(g)+ 3H₂O(g)

question 17

Multiple Choice

Determine ?H for the following reaction, 2NH₃(g) + 5/2O₂(g) ? 2NO(g) + 3H₂O(g)
Given the thermochemical equations below.
$\begin{array}{ll}\mathrm{N}_{2}(g) +\mathrm{O}_{2}(g) \rightarrow 2 \mathrm{NO}(g) & \Delta H=+180.8 \mathrm{~kJ} \\\mathrm{~N}_{2}(g) +3 \mathrm{H}_{2}(g) \rightarrow 2 \mathrm{NH}_{3}(g) & \Delta H=-91.8 \mathrm{~kJ} \\2 \mathrm{H}_{2}(g) +\mathrm{O}_{2}(g) \rightarrow 2 \mathrm{H}_{2} \mathrm{O}(g) & \Delta H=-483.6 \mathrm{~kJ}\end{array}$

• A) -1178.2 kJ
• B) -452.8 kJ
• C) -394.6 kJ
• D) -211.0 kJ
• E) +1178.2 kJ

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Definitions:

Period Costs

Costs not directly associated with the manufacturing process, recognized in the accounting period they arise.

Indirect Cost

Indirect costs are expenses not directly tied to the production of goods or services, such as overhead costs including utilities, rent, and administrative salaries.

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Substances used to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move.

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