Suppose you want to raise the temperature of a 0.21-kg piece of ice from -20.0degrees Celsius to 130degrees Celsius. The heat of fusion is Lf=334 kJ/kg, and the heat of vaporization is Lv=2256 kJ/kg. In this problem, take 1520 J/kg times degree Celsius as the specific heat of ice. How much heat, in kilocalories, must be transferred for this to happen, including the energy needed for phase changes? Also, how much time, in seconds is required to do this, assuming a constant 20.0 kJ/s rate of heat transfer?

Suppose you want to raise the temperature of a 0.21-kg piece of ice from -20.0degrees Celsius to 130degrees Celsius. The heat of fusion is Lf=334 kJ/kg, and the heat of vaporization is Lv=2256 kJ/kg. In this problem, take 1520 J/kg times degree Celsius as the specific heat of ice. How much heat, in kilocalories, must be transferred for this to happen, including the energy needed for phase changes? Also, how much time, in seconds is required to do this, assuming a constant 20.0 kJ/s rate of heat transfer?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter21: Heat And The First Law Of Thermodynamics

Section: Chapter Questions

Problem 71PQ

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