You have just been to the shops and purchased a 3kg bag of ice (assume all at 0°C) to cool a 24 pack of beverages, in 375 ml containers, which is now at 25°C. If you had a perfectly insulated chilly bin, and everything reached a final temperature of 0°C, how much of the ice would have melted if you only had to cool the liquid contents, ignoring the containers? Assume the latent heat of ice melting is 334 kJ/kg. If you now include the heat capacity of the containers, do you still have enough ice for (a) bottles or (b) cans. Would cans or bottles cool faster? Material Cp (kJ/(kg.K) Per container (g) Liquid 4.2 375 Aluminium 0.9 14 Glass 0.84 210

You have just been to the shops and purchased a 3kg bag of ice (assume all at 0°C) to cool a 24 pack of beverages, in 375 ml containers, which is now at 25°C. If you had a perfectly insulated chilly bin, and everything reached a final temperature of 0°C, how much of the ice would have melted if you only had to cool the liquid contents, ignoring the containers? Assume the latent heat of ice melting is 334 kJ/kg. If you now include the heat capacity of the containers, do you still have enough ice for (a) bottles or (b) cans. Would cans or bottles cool faster? Material Cp (kJ/(kg.K) Per container (g) Liquid 4.2 375 Aluminium 0.9 14 Glass 0.84 210

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Energy In Thermal Processes: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 11P

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