Clearly explain each steps [02 marks]ii) a) A nuclear plant produces 540 MW electric power. In the reactor core, energy isreleased (as heat) at the rate of 1600 MW. Steam produced in the reactor enters theturbine at a temperature of 560 K and leaves it at 350 K. What is the highest efficiencythis heat engine can attain?[04 marks]b)Determine the actual efficiency or thermal efficiency of this power plant. [02 marks][02 marks]c) Interpret the difference of two answers from a) and b)

(a) The highest efficiency the heat engine can attain is 37.5% .(b) The actual efficiency or…

Answered: [02 marks] ii) a) A nuclear plant…

University Physics Volume 2

18th Edition

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Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 79AP: A coal power plant consumes 100,000 kg of coal per hour and produces 500 MW of power. If the heat of...

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A coal power plant consumes 100,000 kg of coal per hour and produces 500 MW of power. If the heat of combustion of coal is 30 MJ/kg, what is the efficiency of the power plant?
Explain how water’s entropy can decrease when it freezes without violating the second law of thermodynamics. Specifically, explain what happens to the entropy of its surroundings.
1. What is the efficiency of a steam engine if it absorbed an energy of 2.5 x 10$ J from the boiler and gives up 1.5 x 10ºJ in exhausting during one cycle? Solution: Answer:
The input power to operate a boiler comes from an electrical circuit with a voltage of 110 volts [ V ] and a resistance of 3 ohms [ Ω ]. The boiler produces 70 kilojoules of heat per minute [ k J m i n ] . What is the efficiency of the boiler, expressed as a percentage [ % ] ?
11. A coal-fired power plant produces 9.00 × 1013 J of electrical energy in one day, and operates with an efficiency of 35.0%. (a) How much heat is generated by burning coal at this power plant in one day? (b) How much waste heat is released into the environment (the cold reservoir) in one day? (c) Heat is delivered from the burning coal at a temperature of 480◦C and waste heat is dumped into the environment at a temperature of 30◦C. What is the Carnot efficiency, i.e. the highest efficiency allowed by the Second Law of Thermodynamics, of a heat engine operating between these two temperatures?
1. An engine with an efficiency of 0.2 absorbs 510 J of heat per cycle. (a) How much work does it perform per cycle? W= ✓J (b) How much heat, Qc, does it discharge per cycle? Qc= ✔
2.3 Study the following p-V diagram in figure 1 and answer the que P (N/m) 15 - B A. 10 C. V (m) Figure 1 10 20 30 Calculate: (a) Work done through process A to B (WAB) (b) work done through the process B to C (Wsc): (c) internal energy UAB, if 120J of energy as heat enters the syst (d) the net work done by the system.
1. A heat engine with an efficiency of 35% does 600 Jof work in each cycle. How much heat must besupplied from the high-temperature source in eachcycle?
6. An engine does 10J of work and exhausts 15J of waste heat. (a) what is the efficiency? (b) If the coldreservoir is at 20°C, what is the minimum temperature of the hot reservoir?
35.pls Answer
55. An engine does 18 500 J of work and rejects 6550 J of heat into acold reservoir whose temperature is 285 K. What would be the smallestpossible temperature of the hot reservoir?
4. A typical coal-fired power plant operates with a high-temperature reservoir at Th = 800 K and a low-temperature reservoir at Tc = 300 K. What is the maximum efficiency allowed by the 2nd law of thermodynamics (the Carnot efficiency) for a heat engine operating between these temperatures? Give your answer as a decimal number, not as a percentage. (This isn't in section 4.2, so you might want to also take a quick look at equation 4.5 in section 4.5 of the textbook, or at the introductory material in this week's lab write-up.)

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