AP Chemistry
9.4 Thermodynamic and Kinetic Control
9.3 Gibbs Free Energy and Thermodynamic Favorability
A materials scientist considers the conversion of diamond to graphite at standard conditions.
\(\text{C(s, diamond)} \rightarrow \text{C(s, graphite)}\)
After several years at \(298\text{ K}\), no measurable graphite is detected in a sample of diamond. Which statement best reconciles the thermodynamic data with the observation?
\(\text{C(s, diamond)} \rightarrow \text{C(s, graphite)}\)
| Substance | \(\Delta_{\mathrm f}G^\circ\) at \(298\text{ K}\) |
|---|---|
| \(\text{C(s, diamond)}\) | \(+2.9\text{ kJ/mol}\) |
| \(\text{C(s, graphite)}\) | \(0.0\text{ kJ/mol}\) |
After several years at \(298\text{ K}\), no measurable graphite is detected in a sample of diamond. Which statement best reconciles the thermodynamic data with the observation?
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