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Quantitative calculation questions: 1. Liquid ammonia (boiling point = -33.43°C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(1) from -65.0°C to -12.0°C? Specific heat capacity, NH3(1): 4.7 J/(g K) Specific heat capacity, NH3(g): 35.1 J/(g K) Heat of vaporization: 23.3 kJ/mol Molar mass, M: 17.0 g/mol A) 5.5 kJ B) 6.3 kJ C) 57 kJ D) 340 kJ E) 590 kJ Answer: C

Quantitative calculation questions: 1. Liquid ammonia (boiling point = -33.43°C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(1) from -65.0°C to -12.0°C? Specific heat capacity, NH3(1): 4.7 J/(g K) Specific heat capacity, NH3(g): 35.1 J/(g K) Heat of vaporization: 23.3 kJ/mol Molar mass, M: 17.0 g/mol A) 5.5 kJ B) 6.3 kJ C) 57 kJ D) 340 kJ E) 590 kJ Answer: C

Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter15: Energy And Chemical Change
Section: Chapter Questions
Problem 78A: Alloys When a 58.8-g piece of hot alloy is placed in125 g of cold water in a calorimeter, the...
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Quantitative calculation questions: 1. Liquid ammonia (boiling point = -33.43°C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(1) from -65.0°C to -12.0°C? Specific heat capacity, NH3(1): 4.7 J/(g K) Specific heat capacity, NH3(g): 35.1 J/(g K) Heat of vaporization: 23.3 kJ/mol Molar mass, M: 17.0 g/mol A) 5.5 kJ B) 6.3 kJ C) 57 kJ D) 340 kJ E) 590 kJ Answer: C
Transcribed Image Text:Quantitative calculation questions: 1. Liquid ammonia (boiling point = -33.43°C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(1) from -65.0°C to -12.0°C? Specific heat capacity, NH3(1): 4.7 J/(g K) Specific heat capacity, NH3(g): 35.1 J/(g K) Heat of vaporization: 23.3 kJ/mol Molar mass, M: 17.0 g/mol A) 5.5 kJ B) 6.3 kJ C) 57 kJ D) 340 kJ E) 590 kJ Answer: C
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