Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 19, Problem 25P
(a)
To determine
The total power of the sunlight hitting earth.
(b)
To determine
The net rate at which earth entropy is increasing due to solar
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Chapter 19 Solutions
Physics for Scientists and Engineers
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- (a) infinitesimal amount of heat is added reversibly to a system. By combining the first and second laws, show that dU=TdSdW. (b) When heat is added to an ideal gas, its temperature and volume change from T1 and V1 to T2 and V2 . Show that the entropy change of n moles of the gas is given by S=CnvlnT2T1nRlnV2V1 .arrow_forwardCheck Your Understanding In Example 4.7, the spontaneous flow of heat from a hot object to a cold object results in a net increase in entropy of the universe. Discuss how this result can be related to an increase in disorder of the system.arrow_forwardA 0.50-kg piece of aluminum at 250 is dropped into 1.0 kg of water at 20 . After equilibrium is reached, what is the net entropy change of the system?arrow_forward
- A glass beaker of mass 400 g contains 500 g of water at 27 . The beaker is heated reversibly so that the temperature of the beaker and water rise gradually to 57 . Find the change in entropy of the beaker and water together.arrow_forwardCheck Your Understanding A quantity of heat Q is absorbed from a reservoir at a temperature Th by a cooler reservoir at a temperature Tc . What is the entropy change of the hot reservoir, the cold reservoir, and the universe?arrow_forwardA copper rod of cross-sectional area 5.0 cm2 and length 5.0 m conducts heat from a heat reservoir at 373 K to one at 273 K. What is the time rate of change of the universe's entropy for this process?arrow_forward
- Suppose that the temperature of the water in the previous problem is raised by fist bringing it to thermal equilibrium with a reservoir at a temperature of 40 and then with a reservoir at 80 . Calculate the entropy changes of (a) each reservoir, (b) of the water, and (c) of the universe.arrow_forwardWith the help of the two preceding problems, show that S between states 1 and 2 of nmoles an ideal gas is given by S=CnplnT2T1nRlnP2P1.arrow_forwardIs it possible for the efficiency of a reversible engine to greater than 1.0? Is it possible for the coefficient of performance of a reversible refrigerator to be less than 1.0?arrow_forward
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