Ethanol, C₂H₅OH, Is Being Promoted as a Clean Fuel and Is

question 62

Multiple Choice

Ethanol, C₂H₅OH, is being promoted as a clean fuel and is used as an additive in many gasoline mixtures. Calculate the ΔH°_rxn for the combustion of ethanol. (ΔH°_f [C₂H₅OH(l) ] = -277.7 kJ/mol; ΔH°_f [CO₂(g) ] = -393.5 kJ/mol; ΔH°_f [H2O(g) ] = -241.8 kJ/mol)

• A) -1234.7 kJ
• B) -751.1 kJ
• C) -357.6 kJ
• D) 357.6 kJ
• E) 1234.7 kJ

---

Definitions:

Quick Ratio

A liquidity metric that indicates a company's ability to cover its current liabilities without selling inventory, calculated as (cash plus marketable securities plus accounts receivable) divided by current liabilities.

Temporary Investments

Short-term investments that a company plans to convert into cash within a short period, typically one year or less.

Remote Contingent Liability

A potential financial obligation that is considered to be unlikely to occur; it is noted in financial statements as a footnote to provide full disclosure.

Accrual

A method of accounting that recognizes revenue and expenses when they are incurred, regardless of when cash transactions occur.