Liquid Ammonia Can Be Used as a Refrigerant and Heat

question 87

Multiple Choice

Liquid ammonia can be used as a refrigerant and heat transfer fluid.How much energy is required to heat 25.0 g of NH₃(l) from -65.0°C to -12.0°C? Normal boiling point -33.4°C
Specific heat of NH₃(l) 4.7 J/g • °C
Specific heat of NH₃(g) 2.2 J/g • °C
Molar heat of vaporization 23.5 kJ/mol

• A)4.92 kJ
• B)16.0 kJ
• C)34.5kJ
• D)39.4 kJ
• E)182.8kJ

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