Determine the Heat Given Off to the Surroundings When 9 $\rarr$

question 27

Multiple Choice

Determine the heat given off to the surroundings when 9.0 g of aluminum reacts according to the equation 2Al + Fe₂O₃ $\rarr$ Al₂O₃ + 2Fe, $\Delta$ H°_rxn= -849 kJ/mol.

• A)1.4 × 10² kJ
• B)2.8 × 10² kJ
• C)5.6 × 10² kJ
• D)2.5 × 10³ kJ
• E)7.6 × 10³ kJ

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Definitions:

Marginal Cost

Marginal cost refers to the increase in total cost resulting from producing one additional unit of a good or service.

Total Revenues

The overall amount of income generated from the sale of goods or services before any expenses are subtracted.

Total Costs

The sum of all expenses (fixed and variable) incurred in the production of goods or services.

Long-Run Total Cost

The total cost incurred by a firm when all inputs, including both fixed and variable costs, are fully adjustable.