d) How does your answer in (c) compare to the efficiency that a Carnot engine running between the same two temperatures would have? (e) What is the entropy change for each process if Vo is 1L, and, as above, state a is at room temperature (300 K) and atmospheric pressure (100 kPa)? f) The isochoric cooling process, c→ a, occurs because the gas is brought into contact with an isothermal cold reservoir at temperature Tcold 300K. What is the entropy change of this reservoir during the process ca? = f) What is the total entropy change of the gas plus cold reservoir during the process c→ this tell you about what kind of process this is? a? What does

d) How does your answer in (c) compare to the efficiency that a Carnot engine running between the same two temperatures would have? (e) What is the entropy change for each process if Vo is 1L, and, as above, state a is at room temperature (300 K) and atmospheric pressure (100 kPa)? f) The isochoric cooling process, c→ a, occurs because the gas is brought into contact with an isothermal cold reservoir at temperature Tcold 300K. What is the entropy change of this reservoir during the process ca? = f) What is the total entropy change of the gas plus cold reservoir during the process c→ this tell you about what kind of process this is? a? What does

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 73AP: A Carnot engine operates between 550 and 20 baths and produces 300 kJ of energy in each cycle....

See similar textbooks

Similar questions

In an isochoric process, heat is added to 10 mol of monoatomic ideal gas whose temperature increases from 273 to 373 K. What is the entropy change of the gas?
A 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?
The Carnot cycle is represented by the temperature-entropy diagram shown below. (a) How much heat is absorbed per cycle at the high-temperature reservoir? (b) How much heat is exhausted per cycle at the low-temperature reservoir? (c) How much work is done per cycle by the engine? (d) What is the efficiency of the engine?
Two hundred joules of heat are removed from a heat at a temperature of 200 K. What is the entropy change of the reservoir?
Two hundred grams of water at 0 is brought into contact into thermal equilibrium successively with reservoirs at 20 , 40 , 60 , and 80 . (a) What is the entropy change of the water? (b) Of the reservoir? (c) What is the entropy change of the universe?
Does the entropy increase for a Carnot engine for each cycle?
For the Carnot cycle of Figure 4.12, what is the entropy change of the hot reservoir, the cold reservoir, and the universe? Figure 4.11 The four processes of the Carnot cycle. The working substance is assumed to be an ideal gas whose thermodynamic path MNOP is represented in Figure 4.12. Figure 4.12 The total work done by the gas in the Carnot cycle is shown and given by the area enclosed by the loop MNOPM.
Check Your Understanding A Carnot engine operates between reservoirs at 400 and 30 . (a) What is the efficiency of the engine? (b) If the engine does 5.0 J of work per cycle, how much heat per cycle does it absorb from the high-temperature reservoir? (c) How much heat per cycle does it exhaust to the cold-temperature reservoir? (d) What temperatures at the cold reservoir would give the minimum and maximum efficiency?
A cylinder contains 500 g of helium at 120 atm and 20 . The valve is leaky, and all the gas slowly escapes isothermally into the atmosphere. Use the results of the preceding problem to determine the resulting change in entropy of the universe.
(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 .
A Carnot engine operating between heat reservoirs at 500 and 300 K absorbs 1500 J per cycle at the high-temperature reservoir. (a) Represent the engine's cycle on a temperature-entropy diagram. (b) How much per cycle is done by the engine?
Is it possible for a system to have an entropy change if it neither absorbs nor emits heat during a reversible? transition? What happens it the process is irreversible?