---
title: "The potential energy profile for the elementary gas-phase reaction \\(\\text{NO}(g) + \\text{O}_3(g) \\rightarrow \\text{NO}_2(g) + \\text{O}_2(g)\\) is shown in the diagram.  Based on the diagram, what is the activation energy, \\(E_a\\), for the reverse reaction, \\(\\text{NO}_2(g) + \\text{O}_2(g) \\rightarrow \\text{NO}(g) + \\text{O}_3(g)\\)?"
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url: "https://nerd-notes.com/ubq/119803/"
date_modified: "2026-08-21T08:12:23+00:00"
---

# The potential energy profile for the elementary gas-phase reaction \(\text{NO}(g) + \text{O}_3(g) \rightarrow \text{NO}_2(g) + \text{O}_2(g)\) is shown in the diagram.

Based on the diagram, what is the activation energy, \(E_a\), for the reverse reaction, \(\text{NO}_2(g) + \text{O}_2(g) \rightarrow \text{NO}(g) + \text{O}_3(g)\)?

The potential energy profile for the elementary gas-phase reaction \(\text{NO}(g) + \text{O}_3(g) \rightarrow \text{NO}_2(g) + \text{O}_2(g)\) is shown in the diagram.

Based on the diagram, what is the activation energy, \(E_a\), for the reverse reaction, \(\text{NO}_2(g) + \text{O}_2(g) \rightarrow \text{NO}(g) + \text{O}_3(g)\)?

![A 2D line graph representing a single-step reaction energy profile on bare grayscale axes. The vertical axis is labeled Potential Energy (kJ/mol) with horizontal tick marks and values at 0, 10, 40, and 140. The horizontal axis is labeled Reaction Progress with no numbers. A single solid black curve begins at a horizontal plateau at y = 40 representing the reactants, rises smoothly to a single peak at y = 140 representing the transition state, and descends smoothly to a horizontal plateau at y = 10 representing the products. Thin horizontal dashed guide lines extend from y = 10, y = 40, and y = 140 across to the vertical axis. No other curves, shaded regions, labels, text, or annotations appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1787299943-ZJQU1N.jpg)

- **A.** \(100\text{ kJ/mol}\)
- **B.** \(130\text{ kJ/mol}\)
- **C.** \(140\text{ kJ/mol}\)
- **D.** \(170\text{ kJ/mol}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119803/*