AP Chemistry
9.2 Absolute Entropy and Entropy Change
The oxidation of carbon monoxide gas is represented by the following balanced equation:
\[ 2\,\text{CO}(g) + \text{O}_2(g) \rightarrow 2\,\text{CO}_2(g) \]
Thermodynamic data for the substances involved in the reaction are provided in the table below.
Based on the information in the table, what is the value of \(\Delta S^\circ_{\text{rxn}}\) for the reaction?
\[ 2\,\text{CO}(g) + \text{O}_2(g) \rightarrow 2\,\text{CO}_2(g) \]
Thermodynamic data for the substances involved in the reaction are provided in the table below.
| Substance | \(S^\circ\ (\text{J}/(\text{mol}\cdot\text{K}))\) |
|---|---|
| \(\text{CO}(g)\) | \(198\) |
| \(\text{O}_2(g)\) | \(205\) |
| \(\text{CO}_2(g)\) | \(214\) |
Based on the information in the table, what is the value of \(\Delta S^\circ_{\text{rxn}}\) for the reaction?
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