A 99.8-g aluminum calorimeter contains 243 g of water. The aluminum and water are initially in thermal equilibrium at a temperature of 9.9°C. Two solid objects are then placed in the water. One is a 49.6-g piece of copper with a specific heat of 390 J/(kg⋅°C) and an initial temperature of 80.3°C. The other is of unknown material with a mass of 71.4 g and an initial temperature of 100°C. The entire system reaches thermal equilibrium at a temperature of 19.2°C. The specific heats of aluminum and water are 910 J/(kg⋅°C) and 4186 J/(kg⋅°C), respectively. a)Find the specific heat of the unknown material, in units of J/(kg⋅°C).

A 99.8-g aluminum calorimeter contains 243 g of water. The aluminum and water are initially in thermal equilibrium at a temperature of 9.9°C. Two solid objects are then placed in the water. One is a 49.6-g piece of copper with a specific heat of 390 J/(kg⋅°C) and an initial temperature of 80.3°C. The other is of unknown material with a mass of 71.4 g and an initial temperature of 100°C. The entire system reaches thermal equilibrium at a temperature of 19.2°C. The specific heats of aluminum and water are 910 J/(kg⋅°C) and 4186 J/(kg⋅°C), respectively. a)Find the specific heat of the unknown material, in units of J/(kg⋅°C).

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 68PQ

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