It is well known that the thermal efficiency of heat engines increases as the temperature of the energy source increases. In an attempt to improve the efficiency of a power plant, somebody suggests transferring heat from the available energy source to a higher-temperature medium by a heat pump before energy is supplied to the power plant. What do you think of this suggestion? Explain.

Q: A thermodynamic process occurs with a heat lost by the system. Does the entropy of the system…

A: No beacuse heat loss means increase in entropy according to second law  of thermodynamics.

Q: "A heat engine accepts 200 J of heat from a hot reservoir, does work, and releases 160 J to a cold…

A: Given  Heat taken Q1 = 200 J  Heat given to sink Q2 = 169 J

Q: On a winter day, a certain house loses 1.12 x 108 J of heat to the outside. What is the total change…

A:

Q: Suppose a certain heat engine has an efficiency of 25%. In order for this heat engine to do 450 J of…

A: Given data: The efficiency of engine is η=25%=0.25. The work done by engine is W=450 J.

Q: An electrical power station uses 1.48  1014 J of heat input with an efficiency of 34.7%. (a) How…

A:

Q: A heat pump is a heating system that has an efficiency of about 150 %, that is, for every joule (J)…

A: Let us first look at the statement of Second Law of Thermodynamics, the Kelvin-Planck Statement:…

Q: 40) A certain heat engine extracts 1.30 kJ of heat from a hot temperature reservoir and discharges…

A:

Q: A heat source of unknown temperature supplies energy of (74 + 700)k] to a Carnot heat engine. If…

A: It is given that,

Q: When 0.50 kg of water at 0°C freezes, what is the change in entropy of the water? The latent heat of…

A:

Q: A system does 2.00 x 10° ) of work while 6.20 x 10 ) of heat transfer occurs to the environment.…

A: Given : Work done by the system (W) = 2 x 108 J Heat transfer to the environment (Q) = -6.2 x 108 J…

Q: Which of the following is not a statement or a consequence of the second law of thermodynamics?…

A: Let's check each options one by one. 1. The internal energy of an isolated system is constant. this…

Q: The efficiency of cooking appliances affects the internal heat gain from them since an inefficient…

A:

Q: 24. Eighty joules are added by heat to a system, while it does 20J of work. Later, 30J are added by…

A: According to first law of thermodynamics, dQ = W+dU  Where dQ is heat added or removed…

Q: Which of the following options represents the main characteristic of a heat engine? A. Heat flows…

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Q: A reversible heat engine receives 4000 KJ of heat from a constant temperature source at 600 K. If…

A: Let T1, T2, and Q1 denote the temperature of the source, temperature of the surrounding, and amount…

Q: An air-filled cylinder with a movable piston has a heat reservoir in con- tact with it. The heat…

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Q: The surface of the Sun is approximately at = 700 K, and the temperature of the Earth’s surface is…

A:

Q: Rank the following heat engines in order from highest to lowest thermal efficiency. (i) An engine…

A: The formula for the thermal efficiency is  η=1-Q2Q1 .................... (1) where η is the thermal…

Q: A typical temperature for surface water in a tropical ocean is 27°C. Whereas at a depth of a…

A: Thot = 27 o C = 27 + 273  = 300 K Tcold = 5 o C = 5 + 273  = 278 K Using formula for efficiency : η…

Q: What does the Second Law of Thermodynamics say about how much work can be done by a heat engine?…

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Q: Which of the following processes does not involve a change in entropy?A. An electric heater raises…

A: Entropy change is the measure of change in thermal energy per unit temperature of the system.

Q: A heat engine operates between a high temperature of about 600°C and a low temperature of about…

A: Given: The temperature of hot reservoir is 600°C. The temperature of cold reservoir is 300°C.

Q: It has been proposed to use the thermal gradient of the ocean to drive a heat engine. Suppose that…

A: Given: The temperature at the surface of the ocean is 22 degrees Celcius. The temperature on the…

Q: 10. An engine has a hot reservoir that contains 20,000 J of heat energy at 327° C, and a cold…

A: Given data: The heat energy in the hot reservoir, Q1=20000 J. The heat energy in the cold…

Q: Is it possible to construct a heat engine that creates no thermal pollution?

A: Heat engine is an engine that takes in energy as heat and partially converts it into other forms…

Q: An air-filled cylinder with a movable piston has a heat reservoir in contact with it. The heat…

A: GivenEnergy transfer into the cylinder (∆Q) = 850 JWork done by the piston on the environment (∆W) =…

Q: Which statement is not the second law of thermodynamics? -For a natural process, the entropy…

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Q: The engine of a large ship does 2.00 ✕ 108 J of work with an efficiency of 4.00% (a) How much heat…

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Q: A Carnot heat pump is used to heat and maintain a residential building at 75°F. An energy analysis…

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Q: . If an incandescent light bulb requires 100 units of potential energy to deliver only about 15…

A: Given , Bulb require 100 unit of potential energy to deliver only 15 units of kinetic energy ( in…

Q: If a heat engine performs 200 J or work while absorbing 1000 J of heat energy from the hot…

A: Given data The work performed by the heat engine is given as W = 200 J. The heat absorbed by the…

Q: Which of the following statements about a heat engine must be true?   i) Energy is taken in from a…

A: Statement (i) is false because heat is taken from a hot source and given to a cold sink in order for…

Q: 7. For each of the three heat engines described, state whether it violates the First Law of…

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Q: The Bodø NATO base in northern Norway uses a heat pump to extract heat from ocean water. 7.0°C ocean…

A: Given Data: The final temperature of the ocean water is, T2=7°C The initial temperature of the ocean…

Q: A Carnot heat pump is used to heat and maintain a residential building at 22°C. An energy analysis…

A: Given : TH = 22°C = 22 + 273 = 295 K Q = 2500 kJ/h°C  TL = 4°C = 4 + 273 = 277 K

Q: r. Similarly, a person can be viewed as a heat engine that takes an input of internal energy, uses…

A: Given:- Suppose a trained athlete can function as a heat engine with an efficiency of 0.16. The…

Q: With 2.56 × 10^6 J of heat transfer into an engine, it performs only 1.50 × 10^5 J of work. (a) What…

A: Given data:  Heat transfer into the engine QH = 2.56×106 J Work done (W) = 1.50×105 J Required: The…

Q: The second law of thermodynamics states that we cannot build a perfect heat engine. Explain why.

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Q: The surface waters of tropical oceans are at a temperature of 27°C while water at a depth of 1200 m…

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Q: 32. A gasoline engine takes in 2500 J of the heat and delivers 500J of mechanical work per cycle.…

A: Please note : As per answering quidelines I can answer the first question(Q.32) only. Since this is…

Q: A sample of nitrogen gas undergoes the cyclic thermodynamic process shown in the figure. Which of…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…