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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