Motor Fuels Are Mixtures of Hydrocarbons, but They Can Be

question 12

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.

---

Definitions:

Fishing

The activity of catching fish for commercial, recreational, or subsistence purposes.

Total Allowable Catch (TAC)

The overall limit set by a government or a fisheries commission on the total number of fish or tonnage of fish that fishers collectively can harvest during some particular time period. Used to set the fishing limits for individual transferable quotas (ITQs).

Pacific Halibut

A species of flatfish found in the North Pacific Ocean, known for its commercial and recreational value.

ITQs

Individual Transferable Quotas, a common market-based tool used to regulate fishing efforts and conserve fish stocks by allocating specific catch limits to fishers.