For the Following Reactions,the ΔH°_rxn Is NOT Equal to ΔH°_f

question 8

Multiple Choice

For the following reactions,the ΔH°_rxn is NOT equal to ΔH°_f for the product except for ________.

• A)2Ca (s)+ O₂ (g)→ 2CaO (s)
• B)3Mg (s)+ N₂ (g)→ Mg₃N₂ (s)
• C)C₂H₂ (g)+ H₂ (g)→ H₄ (g)
• D)2C (graphite)+ O₂ (g)→ 2CO (g)
• E)C (diamond)+ O₂ (g)→ CO₂ (g)

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Definitions:

Break-Even

The point at which total costs and total revenue are equal, resulting in no net loss or gain for the business.

Total Dollar Sales

The overall revenue generated from the sale of goods or services, expressed in terms of the total amount of money received.

Operating Leverage

A financial ratio that measures the proportion of fixed costs in a company's cost structure, indicating how a change in sales will affect its operating income.

Net Operating Income

The income produced through a firm's principal commercial activities, not including the subtractions for interest and taxes.