10th Edition

ISBN: 9781118230725

Author: David Halliday, Robert Resnick, Jearl Walker

Publisher: Wiley, John & Sons, Incorporated

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Chapter 20, Problem 67P

Suppose that 260 J is conducted from a constant-temperature reservoir at 400 K to one at (a) 100 K, (b) 200 K, (c) 300 K, and (d) 360 K. What is the net change in entropy ΔS_net of the reservoirs in each case? (e) As the temperature difference of the two reservoirs decreases, does ΔS_net increase, decrease, or remain the same?

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Chapter 20, Problem 66P

Chapter 20, Problem 68P

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Suppose that 260 J is conducted from a constant-temperature reservoir at 400 K to one at (a) 100 K, (b) 200 K, (c) 300 K, and (d) 360 K.What is the net change in entropy Snet of the reservoirs in each case? (e) As the temperature difference of the two reservoirs decreases, does Snet increase, decrease, or remain the same?

(a)On a winter day, a certain house loses 5.33 10 ✕8J of heat to the outside. What is the total change in entropy of the universe due to this heat transfer alone, assuming an average indoor temperature of 24.0°C and an average outdoor temperature of 5.05°C?(b)This large change in entropy implies a large amount of energy has become unavailable to do work. Where do we find more energy when such energy is lost to us?

A 50.0 g block of copper whose temperature is 400 K is placed in an insulating box with a 100 g block of lead whose temperature is 200 K. (a) What is the equilibrium temperature of the twoblock system? (b) What is the change in the internal energy of the system between the initial state and the equilibrium state? (c)What is the change in the entropy of the system?

Chapter 20 Solutions

Fundamentals of Physics Extended

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