---
title: "A student investigates the thermodynamic parameters for the decomposition of a liquid compound at \\(298\\text{ K}\\), as represented by the balanced equation below:  \\[ 2\\,\\text{XO}(l) \\rightarrow 2\\,\\text{X}(s) + \\text{O}_2(g) \\]  | Thermodynamic Parameter | Value | |—|—| | \\(\\Delta H^\\circ\\) | \\(-40.2\\text{ kJ/mol}_{\\text{rxn}}\\) | | \\(\\Delta S^\\circ\\) | \\(+100.\\text{ J}/(\\text{mol}_{\\text{rxn}}\\cdot\\text{K})\\) |  Based on the data in the table, what is the value of the standard Gibbs free energy change, \\(\\Delta G^\\circ\\), for the reaction at \\(298\\text{ K}\\)?"
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url: "https://nerd-notes.com/ubq/119834/"
date_modified: "2026-08-21T08:12:37+00:00"
---

# A student investigates the thermodynamic parameters for the decomposition of a liquid compound at \(298\text{ K}\), as represented by the balanced equation below:

\[ 2\,\text{XO}(l) \rightarrow 2\,\text{X}(s) + \text{O}_2(g) \]

| Thermodynamic Parameter | Value |
|—|—|
| \(\Delta H^\circ\) | \(-40.2\text{ kJ/mol}_{\text{rxn}}\) |
| \(\Delta S^\circ\) | \(+100.\text{ J}/(\text{mol}_{\text{rxn}}\cdot\text{K})\) |

Based on the data in the table, what is the value of the standard Gibbs free energy change, \(\Delta G^\circ\), for the reaction at \(298\text{ K}\)?

A student investigates the thermodynamic parameters for the decomposition of a liquid compound at \(298\text{ K}\), as represented by the balanced equation below:

\[ 2\,\text{XO}(l) \rightarrow 2\,\text{X}(s) + \text{O}_2(g) \]

| Thermodynamic Parameter | Value |
|---|---|
| \(\Delta H^\circ\) | \(-40.2\text{ kJ/mol}_{\text{rxn}}\) |
| \(\Delta S^\circ\) | \(+100.\text{ J}/(\text{mol}_{\text{rxn}}\cdot\text{K})\) |

Based on the data in the table, what is the value of the standard Gibbs free energy change, \(\Delta G^\circ\), for the reaction at \(298\text{ K}\)?

- **A.** \(-70.0\text{ kJ/mol}_{\text{rxn}}\)
- **B.** \(-10.4\text{ kJ/mol}_{\text{rxn}}\)
- **C.** \(+10.4\text{ kJ/mol}_{\text{rxn}}\)
- **D.** \(+70.0\text{ kJ/mol}_{\text{rxn}}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119834/*