What Is the Enthalpy Change When 22

question 31

Multiple Choice

What is the enthalpy change when 22.5 g of CH₄ are burned in excess O₂?

• A) -39.5 kJ
• B) -890 kJ
• C) -1250 kJ
• D) +890 kJ
• E) +1250 kJ

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Definitions:

Standard Cost Variances

The differences between the actual costs incurred and the standard costs, analyzed to assess performance in various areas such as materials, labor, and overhead.

Cost of Goods Sold

The direct costs attributable to the production of the goods sold by a company, including the cost of the materials and labor directly used to create the good.

Direct Labor Costs

Expenses associated with the wages and benefits of employees who directly work on the production of goods.

Cash Account

An account that tracks the amount of cash available to a business or individual.