There Is Concern That the Combustion of Fossil Fuels Like

question 16

Multiple Choice

There is concern that the combustion of fossil fuels like coal and petroleum contributes to climate change by adding carbon dioxide to the atmosphere. Electric cars are being promoted as a way to address this situation by reducing the use of gasoline. Yet most electricity is produced by coal-fired power plants. Several factors need to be considered in determining whether electric cars actually are helpful in this regard. One is the environmental values of these fuels. Estimate the environmental value of coal compared to gasoline from the following information. The environmental value is defined as the amount of energy obtained per mole of carbon dioxide produced, so a larger environmental value is better. Substance
Model Compound
Molar Mass
H^o_combustion
Coal
C₁₃₅H₉₆O₉NS
1906 g/mol
44,000 kJ/mol
Gasoline
C₈H₁₈
114 g/mol
5,460 kJ/mol

• A) coal = 23.1 kJ/mol, gasoline = 47.9 kJ/mol is better
• B) coal = 386 kJ/mol is better, gasoline = 2.86 kJ/mol
• C) coal = 182 kJ/mol is better, gasoline = 152 kJ/mol
• D) coal = 325 kJ/mol, gasoline = 683 kJ/mol is better
• E) coal = 527 kJ/mol is better, gasoline = 224 kJ/mol

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Definitions:

Inventory Accounting Methods

Different approaches, such as FIFO (First In, First Out), LIFO (Last In, First Out), and weighted average cost, used to value and manage inventory.

Adjusting Entry

An adjusting entry is a journal entry made in accounting records to adjust income and expense accounts so they comply with the accrual concept.

Interest-Bearing Note

A debt instrument in which the issuer pays the holder interest at a specified rate over the term of the note.