Ammonia (NH₃)is Used as a Refrigerant

question 45

Multiple Choice

Ammonia (NH₃) is used as a refrigerant.At its boiling point of -33 °C,the standard enthalpy of vaporization of ammonia is 23.3 kJ/mol.How much heat is released when 50.0 g of ammonia is condensed at -33 °C?

• A) -0.466 kJ
• B) -7.94 kJ
• C) -36.6 × 10³ kJ
• D) -68.4 kJ
• E) -1.17 × 10³ kJ

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Definitions:

Traceable Fixed Expenses

Fixed expenses that can be directly linked to a specific segment of a business and would disappear if the segment did not exist.

Contribution Margin

The difference between the sales revenue of a product and its variable costs, indicating how much contributes to covering fixed costs and generating profit.

Variable Expenses

Costs or expenses that change in proportion to business activity levels or volume, such as sales commissions or raw material costs.

Traceable Fixed Expenses

Fixed costs directly associated with specific business segments, which would be eliminated if the segment was discontinued.