The Reaction of Nitrogen with Oxygen to Form Nitrogen Dioxide $\rightarrow$

question 93

Multiple Choice

The reaction of nitrogen with oxygen to form nitrogen dioxide gas at 25 C and 1 atm requires approximately 66.4 kJ of thermal energy.The change in internal energy is about 68.9 kJ.Which statement below is true?
2N₂ (g) +O₂ (g) $\rightarrow$ 2 NO₂ (g)

• A)The reaction is exothermic and work is done on the system by the surroundings.
• B)The reaction is exothermic and work is done by the system on the surroundings.
• C)The reaction is endothermic and work is done on the system by the surroundings.
• D)The reaction is endothermic and work is done by the system on the surroundings.
• E)The heat and work associated with the reaction cannot be determined without more information.

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Definitions:

Equivalent Unit

An equivalent unit is a measure used in cost accounting to express the amount of materials or labor necessary to complete a partially finished product, relative to a finished product unit.

Process Costing

A costing method used in manufacturing where costs are assigned to batches or lots of products, suitable for continuous or repetitive processes.

Conversion Costs

Conversion costs are the costs required to convert raw materials into finished products, including both direct labor costs and manufacturing overhead costs.

Equivalent Units

A concept in cost accounting used to express the amount of work done by an incomplete process on units of output, making partial units comparable to complete units.