An inventor claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear-fuelgenerated energy source whose temperature is 920 R and a sink at 490 R that radiates waste heat to deep space. He also claims that this engine produces 4.5 hp while rejecting heat at a rate of 15,000 Btu/h. Is this claim valid?

Q: A gasoline engine absorbs 2.9 kJ of heat and performs 0.7 kJ of mechanical work in each cycle. The…

A: Heat absorbed (Q)= 2.9 KJ = 2.9× 10³ J Work done (W)= 0.7 KJ = 0.7× 10³ J   We know that…

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: Which of the following is TRUE regarding the total heat Q absorbed by the engine in one cycle?

A: We know that change in internal energy of a system, the heat absorbed and work done are related by,…

Q: Calculate the ideal efficiency of an engine in which fuel is heated to 2700 K and the surrounding…

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

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Q: A steam engine is operating at its theoretical maximum efficiency of 60%. If the waste heat has a…

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Q: 3.0 moles of helium gas, that initially occupies a volume of 30 L at a temperature of 280 K,…

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Q: Evaluate the entropy of 600 g water at 25°C [specific heat capacities of ice =2090J/kg. K, Water =…

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Q: Shuk Yee and Jason add QH = 43 J to an ideal gas undergoing the process below. What is the thermal…

A: Efficiency(η) is the ratio of output heat/energy(Qo) to the input heat/energy(Qi). i.e. :- η=QoQi It…

Q: A steam engine delivers 5.4×108 J of work per minute and services 3.6×109J of heat per minute from…

A: Given :W= 5.4 x 108JH= 3.6 x 109J

Q: A solar energy based heat engine which receives 80 kJ of heat at 100 deg C and rejects 70 kJ of heat…

A: Heat absorbed = 80 kJ Temperature of hot reservoir = 100oC Heat rejected = 70 kJ temperature of cold…

Q: A Carnot engine operates between 145°C and 16°C. How much ice can the engine melt from its exhaust…

A: Given:  The intial temperature of the Carnot engine is 145oC The final temperature of the engine is…

Q: If the plant operates at 50.0% of its maximum efficiency and its power output is 1.23 × 108 W, at…

A: The given data are: TH=540 KTL=313 KQH=1.23×108 W Here, TH is the higher temperature, TL is the…

Q: A nuclear power plant operates at 70 % of its maximum theoretical (Carnot) efficiency between…

A: Given: The source temperature is 620 °C. The sink temperature is 330 °C. The efficiency of the power…

Q: At a power plant that produces 1 GW (109 watts) of electricity, the steam turbines take in steam at…

A: Given: The temperature of steam is 500 degrees Celcius. The temperature of waste expelled is 20…

Q: What is wrong with the claim that a cyclical heat engine does 4.00 kJ of work on an input of 24.0 kJ…

A: Energy conservation law states that Energy can never be created or destroyed, it can only be…

Q: A steam-driven turbine is one major component of an electric power plant. Why is it advantageous to…

A: A steam turbine works on the principal of conversion of energy. The energy in the steam stored in…

Q: consider a cyclic heat engine consisting of one mole of a monoatomic ideal gas (y=5/3)

A: Given;- consider a cyclic heat engine consisting of one mole of a monoatomic ideal gas (y=5/3)…

Q: You design an engine that takes in 26 kJ of heat at 720 K in each cycle and rejects heat at a…

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Q: 5 6. A sample of ideal gas is expanded to twice its original volume of 1.00 m3 in a quasi-static…

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Q: An engine manufacturer claims that the engine they have developed will in each cycle take 100 J of…

A: In this given question, We have to check the given statement is true or not.

Q: Consider two actual power plants operating with solar energy. Energy is supplied to one plant from a…

A: The efficiency of a power plant is maximum when the heat is supplied to the possible highest…

Q: A heat engine absorbs 2500 J of heat at 250°C and expels 2000 J at a temperature of 50°C. The change…

A: Given, Q1 = 2500 J T1 = 250 C∘ = 250+273.15 = 523.15 K Q2 = 2000 J T2 = 50 C∘ = 50+273.15 = 323.15 K…

Q: What three processes occur in every heat engine?

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Q: A nuclear power plant operates at 75 % of its maximum theoretical (Carnot) efficiency between…

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Q: Somebody claims that at very high pressure ratios, the use of regeneration actually decreases the…

A: At very high-pressure ratios, the gas temperature at the turbine exit may be lower than the…

Q: A refrigerator works between temperatures TA = 105°C and TB = 5°C and has a quarter of the maximum…

A: Given:T1=105°C=378 KT2=5°C=278 Krate of work done Wt=30 watts

Q: At 500 K and 1500 kPa, a rigid tank contains 1-kilogram methane. It has now been cooled to 300 K.…

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Q: An inventor claims to have built an engine that produces2.00 MW of usable work while taking in 3.00…

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Q: AN IDEAL REFRIGERATOR REMOVES HEAT AT THE RATE OF 0.10KW FROM ITS INTERIOR (+2C) AND EXHAUSTS HEAT…

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Q: How much work is done by a gasoline engine that is 20 % efficient and loses 750 J to the cooling…

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Q: A car tire contains 0.0390 m3 of air at a pressure of 2.20×105 N/m2 (about 32 psi). How much more…

A: Given information: Here, P is the car’s tire pressure and Patm is the atmospheric pressure and V is…

Q: A car tire contains 0.0380 m3 of air at a pressure of 2.20 × 105 Pa (about 32 psi). How much more…

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Q: An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels. If…

A: The given values are,

Q: A heat source generates heat at a rate of 63.0 W (1 W=1 J/s). How much entropy does this produce per…

A: Given:Heat generation rate = 63 W (1 W=1 J/s)Surrounding temp. = 27.2 °CHeat transfer is…

Q: An ideal gasoline engine operates with an initial cycle temperature of 48 C and exhaust temperature…

A: Solution: Convert the initial cycle temperature of 48 C to Kelvin scale. T1=48C=48+273 K=321 K…

Q: An engineer must design a refrigerator that does 300 J of work per cycle to extract 2100 J of heat…

A: Write the variables with suitable value.

Q: An inventor claims to have developed a heat pump that produces a 200-kW heating effect for a 293 K…

A: The coefficient of performance of the heat pump is

Q: From a work-production perspective, which is more valuable: (a) thermal energy reservoirs at 675 K…

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Q: A total of a 185 J of work is done on a gaseous refrigerant as it under goes compression, If the…

A: Given data The amount of total work done on the gas is W=-185 J. The increase in internal energy of…