---
title: "A student determines the standard enthalpy change, \\(\\Delta H^\\circ\\), for the conversion of graphite to diamond: \\[\\text{C(s, graphite)} \\rightarrow \\text{C(s, diamond)}\\] The student is provided with the following standard enthalpies of combustion: \\[\\text{C(s, graphite)} + \\text{O}_2\\text{(g)} \\rightarrow \\text{CO}_2\\text{(g)} \\quad \\Delta H^\\circ = -393.5 \\text{ kJ/mol}_{rxn}\\] \\[\\text{C(s, diamond)} + \\text{O}_2\\text{(g)} \\rightarrow \\text{CO}_2\\text{(g)} \\quad \\Delta H^\\circ = -395.4 \\text{ kJ/mol}_{rxn}\\] Based on these data, what is the value of \\(\\Delta H^\\circ\\) for the conversion of graphite to diamond?"
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url: "https://nerd-notes.com/ubq/119362/"
date_modified: "2026-08-19T12:40:00+00:00"
---

# A student determines the standard enthalpy change, \(\Delta H^\circ\), for the conversion of graphite to diamond:
\[\text{C(s, graphite)} \rightarrow \text{C(s, diamond)}\]
The student is provided with the following standard enthalpies of combustion:
\[\text{C(s, graphite)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -393.5 \text{ kJ/mol}_{rxn}\]
\[\text{C(s, diamond)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -395.4 \text{ kJ/mol}_{rxn}\]
Based on these data, what is the value of \(\Delta H^\circ\) for the conversion of graphite to diamond?

A student determines the standard enthalpy change, \(\Delta H^\circ\), for the conversion of graphite to diamond:
\[\text{C(s, graphite)} \rightarrow \text{C(s, diamond)}\]
The student is provided with the following standard enthalpies of combustion:
\[\text{C(s, graphite)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -393.5 \text{ kJ/mol}_{rxn}\]
\[\text{C(s, diamond)} + \text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} \quad \Delta H^\circ = -395.4 \text{ kJ/mol}_{rxn}\]
Based on these data, what is the value of \(\Delta H^\circ\) for the conversion of graphite to diamond?

- **A.** \(+1.9 \text{ kJ/mol}_{rxn}\)
- **B.** \(+393.5 \text{ kJ/mol}_{rxn}\)
- **C.** \(+395.4 \text{ kJ/mol}_{rxn}\)
- **D.** \(+788.9 \text{ kJ/mol}_{rxn}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119362/*