5. Calculate AH Txn for the combustion of butanol: CH3CH2CH2CH2OH (I) +6 02 (g) → 4 CO2 (g) + 5 H20 (g) Compound САНОН () AH"r (kJ/mol) -332.8 CO2 (g) H2O (g). -393.5 -241.8

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### Calculating the Enthalpy Change for the Combustion of Butanol

**Combustion Reaction:**  
\[ \text{C}_4\text{H}_9\text{OH (l)} + 6 \text{O}_2 \text{(g)} \rightarrow 4 \text{CO}_2 \text{(g)} + 5 \text{H}_2\text{O (g)} \]

**Given Data:**  
The table below lists the standard enthalpy of formation (\( \Delta H^\circ_f \)) for each compound involved in the reaction.

| Compound       | \( \Delta H^\circ_f \) (kJ/mol) |
|----------------|--------------------------|
| C\(_4\)H\(_9\)OH (l)   | -332.8                   |
| CO\(_2\) (g)          | -393.5                   |
| H\(_2\)O (g)          | -241.8                   |

To calculate the enthalpy change for the reaction (\( \Delta H^\circ_{\text{rxn}} \)), use the formula:

\[ \Delta H^\circ_{\text{rxn}} = \sum (\Delta H^\circ_f \, \text{of products}) - \sum (\Delta H^\circ_f \, \text{of reactants}) \] 

This calculation involves substituting the known values from the table to determine the overall energy change during the combustion of butanol.
Transcribed Image Text:### Calculating the Enthalpy Change for the Combustion of Butanol **Combustion Reaction:** \[ \text{C}_4\text{H}_9\text{OH (l)} + 6 \text{O}_2 \text{(g)} \rightarrow 4 \text{CO}_2 \text{(g)} + 5 \text{H}_2\text{O (g)} \] **Given Data:** The table below lists the standard enthalpy of formation (\( \Delta H^\circ_f \)) for each compound involved in the reaction. | Compound | \( \Delta H^\circ_f \) (kJ/mol) | |----------------|--------------------------| | C\(_4\)H\(_9\)OH (l) | -332.8 | | CO\(_2\) (g) | -393.5 | | H\(_2\)O (g) | -241.8 | To calculate the enthalpy change for the reaction (\( \Delta H^\circ_{\text{rxn}} \)), use the formula: \[ \Delta H^\circ_{\text{rxn}} = \sum (\Delta H^\circ_f \, \text{of products}) - \sum (\Delta H^\circ_f \, \text{of reactants}) \] This calculation involves substituting the known values from the table to determine the overall energy change during the combustion of butanol.
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