Motor Fuels Are Mixtures of Hydrocarbons, but They Can Be

question 72

Essay

Motor fuels are mixtures of hydrocarbons, but they can be characterized by their average properties. Gasoline (114 g/mol average, d  0.69 g/mL) and diesel fuel (226 g/mol average, d  0.85 g/mL) have average enthalpies of combustion of 5,650 kJ/mol and 10,200 kJ/mol, respectively. Calculate the fuel density (kJ/mL) of these compounds, and determine how many times more valuable diesel fuel is in terms of its energy content as measured by fuel density.

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Definitions:

Common Stock

Equity ownership in a corporation, with rights to share in its profits, and typically with voting rights in corporate governance.

Paid in Excess

A financial term referring to amounts paid over and above the nominal or par value of a security at the time of issuance.

Retained Earnings

Profits that a company has earned to date, less any dividends or other distributions paid to investors.

Stock Dividend

A dividend payment made in the form of additional shares rather than a cash payout.