Heat engines always give off a certain amount of heat to a lowtemperature reservoir. Would it be possible to use this “waste”heat as the heat input to a second heat engine, and then usethe “waste” heat of the second engine to run a third engine,and so on?

Q: Can improved engineering and materials be employed in heat engines to reduce heat transfer into the…

A: Heat engine works in a cycle. Second law of thermodynamics implies that no system can entirely…

Q: When a system is taken from the state A to the state B ( as shown in figur along the path ACB, 80…

A: (i) To determine: The amount of heat flow along the path ADB, when work done is 10 Joules.  The…

Q: Suppose the temperature of the hot reservoir is increased by 16 K, from 576 K to 592 K, and that the…

A: We have to determine the new efficiency of the engine is greater than, less than or equal to 0.470.

Q: In a refrigerator, one removes heat from a lower temperature and deposits to the surroundings at a…

A: Given data- Power of the motor P=1 kW Temperature of source-                   T1=27°C  or T1=27+273…

Q: 76. Heat Q fl ows spontaneously from a reservoir at 394 K into a reservoir at 298 K. Because of the…

A: The expression for calculate unavailable work is W=T-QTh+QTcQ=WT-1Th+1Tc

Q: Compare the thermodynamic efficiency limits for heat engines operating from a) a 150 degrees C…

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Q: During each cycle of its operation, a certain gasoline engine consumes 500 joules of chemical while…

A: Write the given values with the suitable variables. Q1=500 JQ2=300 J Here, Q1 and Q2 are the heat…

Q: In the electrical power plant, the easy way to increase the efficiency is to keep the temperature of…

A: The relation between the efficiency of the heat engine and the temperature of the cold and hot…

Q: What is the mechanical work output per cycle and thermal efficiency of an engine that takes 19 kJ of…

A: Please see the answer below.

Q: How much work is done per cycle by a Carnot engine operating between +14.0 degrees Celcius and -20.0…

A: Efficiency of carnot engine is,

Q: 64. GO The inside of a Carnot refrigerator is maintained at a temperature of 277 K, while the…

A: Given data The temperature inside the refrigerator Tl = 227 K. The temperature inside the kitchen is…

Q: According to the first law of thermodynamics, under what conditions would it be possible for a…

A: Yes. The internal energy of the system will not change if it performs the same amount of work as the…

Q: Should the cooling fluid for an engine have a large or a small heat capacity? Explain.

A: Given: Should the cooling fluid for an engine have a large or a small heat capacity? Explain.

Q: Which has more entropy: (a)  a pile of bricks, or the resulting house;

A: Entropy is a measure of disorder and entropy increases when a thermodynamic system goes from an…

Q: Which law of thermodynamics is most pertinent to the statementthat “all the king’s horses and all…

A: Second law of thermodynamics is most pertinent to the situation. This law states that physical…

Q: A certain heat engine does 31.2 k of work and dissipates 8.34 k of waste heat in a cydical process.…

A: Given Data: The work done by the engine is, W=31.2 kJ The dissipated heat energy is,…

Q: would a 100% efficient engine violate the first law of thermodynamics? What about a workless…

A: would a 100% efficient engine violate the first law of thermodynamics? What about a workless…

Q: Suppose we lowerthe temperature of the cold reservoir to 295 K; the temperature ofthe hot reservoir…

A: Temperature of cold reservoir = T2=295 K Temperature of Hot reservoir = T1=576 K Heat drawn from the…

Q: show that absolute zero is unattainable on the basis of third law of thermodynamics

A: According to third law of thermodynamics: - Third law of thermodynamics states entropy of a system…

Q: What is reversible process in thermodynamics?

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Q: A Carnot refrigerator extracts heat from a freezer at -5 degree C and exhausts it at 25 degree C .…

A: Convert the temperature from degree centigrade to Kelvin. And

Q: Differentiate between the reversible and irreversible process in thermodynamics.

A: Reversible processes are slow processes contains a series of stages and in stage the thermodynamic…

Q: The heat machine receives 1200 J of heat from high-tempera turo heat source and re lease the heat of…

A: The thermal efficiency (η) also the performance of a machine is expressed as the fraction of heat…

Q: Consider an inefficient engine that draws 200 J of heat from a hot reservoir at 100o C, converts 48…

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Q: . Compute the amount of latent heat released when 50 kg of liquid water freezes.

A:

Q: Is it theoretically possible to devise a heat engine which will create no thermal pollution?

A: Given:  heat engine with no pollution.

Q: (a) What is the efficiency (in percent) of a cyclical heat engine in which 30o.0 kJ of heat transfer…

A: Given: Amount of heat transfer to the environment = 30 KJ Amount of heat transfer to the engine = 50…

Q: during isothermal process of an ideal gas whose internal energy only depends on its temperature does…

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Q: (a) A cyclical heat engine, operating between temperatures of 450C and 150C produces 4.00 MJ of work…

A: (a) The net heat transfer is ΔQ=Qin+Qout In this case, ΔQ=5+Qout The first law of thermodynamics…

Q: What is the maximum efficiency of a heat engine operating between 68oF and 273 kelvins, the…

A: temperature T_1 =68 F =293.15Ktemperature T_2 =273 K   the maximum efficiency of a heat engine…

Q: An inventor claims a new cyclic engine that uses organic grapejuice as its working material.…

A: heat absorbed, QH = 1250 J  temperature of hot reservoir, TH = 1010 K work, W = 1120J temperature of…