Given the Standard Enthalpies of Formation for the Following Substances

question 75

Multiple Choice

Given the standard enthalpies of formation for the following substances, determine the change in enthalpy for the combustion of 1.0 mol of butane. $\begin{array}{lc}\text { Substance } & \Delta \boldsymbol{H} \\& \circ \\& \mathrm{f} \\& \text { in } \mathbf{k J} / \mathbf{m o l} \\\mathrm{C}_{4} \mathrm{H}_{10}(g) & -124.7 \\\mathrm{CO}_{2}(g) & -393.5 \\\mathrm{H}_{2} \mathrm{O}(g) & -241.8\end{array}$

• A) +2,658 kJ/mol
• B) -5,317 kJ/mol
• C) -2,658 kJ/mol
• D) +5,317 kJ/mol
• E) -3,647 kJ/mol

---

Definitions:

Fees Earned

Income earned from providing services before receiving payment.

Rent Revenue

Income earned from leasing out property or space to tenants.

Year-End Closing Process

The series of steps taken by businesses at the end of an accounting year to close out books, including reconciling accounts and preparing financial statements.

End-Of-Period Spreadsheet

A tool used in accounting to gather all the balances of ledger accounts to calculate adjustments and prepare financial statements at the end of an accounting period.