---
title: "A student investigates the decomposition reaction represented below at \\(300. \\text{ K}\\).  \\(2\\text{N}_2\\text{O}_5\\text{(g)} \\rightarrow 4\\text{NO}_2\\text{(g)} + \\text{O}_2\\text{(g)}\\)  The thermodynamic parameters for the reaction at \\(300. \\text{ K}\\) are given in the table below.  | Thermodynamic Parameter | Value | |—|—| | \\(\\Delta H^\\circ\\) | \\(-40.0 \\text{ kJ/mol}_{rxn}\\) | | \\(\\Delta S^\\circ\\) | \\(+200. \\text{ J/(mol}_{rxn}\\cdot\\text{K)}\\) |  Based on the data, what is the standard Gibbs free energy change, \\(\\Delta G^\\circ\\), for the reaction at \\(300. \\text{ K}\\)?"
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url: "https://nerd-notes.com/ubq/119327/"
date_modified: "2026-08-19T12:39:49+00:00"
---

# A student investigates the decomposition reaction represented below at \(300. \text{ K}\).

\(2\text{N}_2\text{O}_5\text{(g)} \rightarrow 4\text{NO}_2\text{(g)} + \text{O}_2\text{(g)}\)

The thermodynamic parameters for the reaction at \(300. \text{ K}\) are given in the table below.

| Thermodynamic Parameter | Value |
|—|—|
| \(\Delta H^\circ\) | \(-40.0 \text{ kJ/mol}_{rxn}\) |
| \(\Delta S^\circ\) | \(+200. \text{ J/(mol}_{rxn}\cdot\text{K)}\) |

Based on the data, what is the standard Gibbs free energy change, \(\Delta G^\circ\), for the reaction at \(300. \text{ K}\)?

A student investigates the decomposition reaction represented below at \(300. \text{ K}\).

\(2\text{N}_2\text{O}_5\text{(g)} \rightarrow 4\text{NO}_2\text{(g)} + \text{O}_2\text{(g)}\)

The thermodynamic parameters for the reaction at \(300. \text{ K}\) are given in the table below.

| Thermodynamic Parameter | Value |
|---|---|
| \(\Delta H^\circ\) | \(-40.0 \text{ kJ/mol}_{rxn}\) |
| \(\Delta S^\circ\) | \(+200. \text{ J/(mol}_{rxn}\cdot\text{K)}\) |

Based on the data, what is the standard Gibbs free energy change, \(\Delta G^\circ\), for the reaction at \(300. \text{ K}\)?

- **A.** \(-100. \text{ kJ/mol}_{rxn}\)
- **B.** \(-40.2 \text{ kJ/mol}_{rxn}\)
- **C.** \(-20.0 \text{ kJ/mol}_{rxn}\)
- **D.** \(+20.0 \text{ kJ/mol}_{rxn}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119327/*