- Practice Exercise 2 Carbon occurs in two forms, graphite and diamond. The en- thalpy of the combustion of graphite is -393.5 kJ/mol, and that of diamond is –395.4 kJ / mol: C(graphite) + O2(8) → CO2(8) AH = -393.5 kJ %3D C(diamond) + O2(8) – CO2(8) AH = -395.4 kJ > %3D Calculate AH for the conversion of graphite to diamond: C(graphite) C(diamond) AH = ?

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### Practice Exercise 2

Carbon occurs in two forms, graphite and diamond. The enthalpy of the combustion of graphite is \( -393.5 \, \text{kJ/mol} \), and that of diamond is \( -395.4 \, \text{kJ/mol} \):

\[ \text{C(graphite)} + \text{O}_2(g) \rightarrow \text{CO}_2(g) \quad \Delta H = -393.5 \, \text{kJ} \]

\[ \text{C(diamond)} + \text{O}_2(g) \rightarrow \text{CO}_2(g) \quad \Delta H = -395.4 \, \text{kJ} \]

Calculate \(\Delta H\) for the conversion of graphite to diamond:

\[ \text{C(graphite)} \rightarrow \text{C(diamond)} \quad \Delta H = \, ? \]
Transcribed Image Text:### Practice Exercise 2 Carbon occurs in two forms, graphite and diamond. The enthalpy of the combustion of graphite is \( -393.5 \, \text{kJ/mol} \), and that of diamond is \( -395.4 \, \text{kJ/mol} \): \[ \text{C(graphite)} + \text{O}_2(g) \rightarrow \text{CO}_2(g) \quad \Delta H = -393.5 \, \text{kJ} \] \[ \text{C(diamond)} + \text{O}_2(g) \rightarrow \text{CO}_2(g) \quad \Delta H = -395.4 \, \text{kJ} \] Calculate \(\Delta H\) for the conversion of graphite to diamond: \[ \text{C(graphite)} \rightarrow \text{C(diamond)} \quad \Delta H = \, ? \]
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