Chapter 16: Temperature and Heat Selected Solutions

Selected Solutions

17. (a) Aluminum has the larger coefficient of volumetric expansion, therefore, the aluminum cube will enclose a greater volume.

(b) Since the cubes initially enclose equal volumes, their difference in volume after the temperature change equal the difference between the changes in temperature.

33. Since the environment is insulated there is zero net heat flow in or out of the system. Therefore,

35. Since there is zero net heat flow:

41. (a) The temperature of the junction is greater than 55 ^oC. Since aluminum has a smaller thermal conductivity than copper, it must have a greater temperature difference across it to have the same heat flow.

(b) At the interface, the heat flow must be the same for both rods. Set Q_Cu = Q_Al.

43. We can use the fact that the heat flows at an equal rate throughout the entire rod.

Selected Solutions by David Reid, Eastern Michigan University. ©2002 by Prentice Hall, Inc.

© 2000-2002 by Prentice-Hall, Inc. A Pearson Company Distance Learning at Prentice Hall Legal Notice