Exhibit 17-4 Consider the reaction of nitrogen monoxide and oxygen gas to form nitrogen dioxide as shown below to answer the following question(s). NO (g) + O 2 (g)→2 NO 2 (g)
-Refer to Exhibit 17-4. Which statement below is correct about the reaction above?

Question

Quizplus · Accepted Answer

The reaction is exothermic (ΔH < 0) and the entropy decreases (ΔS < 0), meaning that the spontaneity of the reaction depends on temperature. At lower temperatures, the decrease in entropy is not significant enough to outweigh the exothermicity, making the reaction spontaneous. At higher temperatures, however, the decrease in entropy becomes significant enough to make the reaction non-spontaneous.

Exhibit 17-4 Consider the Reaction of Nitrogen Monoxide and Oxygen