The quantity of heat Q that changes the temperature ΔT of a mass m of a substance is given by Q=c⋅m⋅ΔT, where c is the specific heat capacity of the substance. For example, for H2O, c=1 cal/(g⋅°C). And for a change of phase, the quantity of heat Q that changes the phase of a mass m is Q=mL, where L is the heat of fusion or heat of vaporization of the substance. For example, for H2O, the heat of fusion is 80 cal/g (or 80 kcal/kg) and the heat of vaporization is 540 cal/g (or 540 kcal/kg). Use these relationships to determine the number of calories to change 0.60 kg of 0°C ice to 0.60 kg of 100 °C steam.

The quantity of heat Q that changes the temperature ΔT of a mass m of a substance is given by Q=c⋅m⋅ΔT, where c is the specific heat capacity of the substance. For example, for H2O, c=1 cal/(g⋅°C). And for a change of phase, the quantity of heat Q that changes the phase of a mass m is Q=mL, where L is the heat of fusion or heat of vaporization of the substance. For example, for H2O, the heat of fusion is 80 cal/g (or 80 kcal/kg) and the heat of vaporization is 540 cal/g (or 540 kcal/kg). Use these relationships to determine the number of calories to change 0.60 kg of 0°C ice to 0.60 kg of 100 °C steam.

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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