The combustion of heptane, C7H16, occurs via the reaction C7H16 (g) + 1102 (g)→7CO2(g) + 8H₂O(g) with heat of formation values given by the following table: Substance ΔΗ (kJ/mol) AHxn= Submit Calculate the enthalpy for the combustion of 1 mole of heptane. Express your answer to four significant figures and include the appropriate units. ► View Available Hint(s) μÅ C7H16 (g) CO₂(g) H₂O(g) Value -187.9 -393.5 -241.8 ĊI ? Units

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**The Combustion of Heptane:**

The combustion reaction of heptane \((\text{C}_7\text{H}_{16})\) is represented by the equation:

\[
\text{C}_7\text{H}_{16}(g) + 11\text{O}_2(g) \rightarrow 7\text{CO}_2(g) + 8\text{H}_2\text{O}(g)
\]

The heat of formation values for the substances involved in the reaction are as follows:

| Substance | \( \Delta H_f^\circ \) (kJ/mol) |
|-----------|-------------------------------|
| \(\text{C}_7\text{H}_{16}(g)\) | -187.9                        |
| \(\text{CO}_2(g)\)            | -393.5                        |
| \(\text{H}_2\text{O}(g)\)     | -241.8                        |

**Task:** Calculate the enthalpy change for the combustion of 1 mole of heptane.

**Instructions:** 
- Your answer should be expressed to four significant figures, with appropriate units.
- Use the provided table and reaction equation to calculate the enthalpy change \((\Delta H_\text{rxn}^\circ)\).

**Response Box:**

\[
\Delta H_\text{rxn}^\circ = \text{Value} \, \text{Units}
\]

**Note:** For assistance, you can view the available hint(s). 

Submit your answer once you have completed the calculation.
Transcribed Image Text:**The Combustion of Heptane:** The combustion reaction of heptane \((\text{C}_7\text{H}_{16})\) is represented by the equation: \[ \text{C}_7\text{H}_{16}(g) + 11\text{O}_2(g) \rightarrow 7\text{CO}_2(g) + 8\text{H}_2\text{O}(g) \] The heat of formation values for the substances involved in the reaction are as follows: | Substance | \( \Delta H_f^\circ \) (kJ/mol) | |-----------|-------------------------------| | \(\text{C}_7\text{H}_{16}(g)\) | -187.9 | | \(\text{CO}_2(g)\) | -393.5 | | \(\text{H}_2\text{O}(g)\) | -241.8 | **Task:** Calculate the enthalpy change for the combustion of 1 mole of heptane. **Instructions:** - Your answer should be expressed to four significant figures, with appropriate units. - Use the provided table and reaction equation to calculate the enthalpy change \((\Delta H_\text{rxn}^\circ)\). **Response Box:** \[ \Delta H_\text{rxn}^\circ = \text{Value} \, \text{Units} \] **Note:** For assistance, you can view the available hint(s). Submit your answer once you have completed the calculation.
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