A gasoline engine has a compression ratio of 6.00. (a) What is the efficiency of the engine if it operates in an idealized Otto cycle? (b) What If? If the actual efficiency is 15.0%, what fraction of the fuel is wasted as a result of friction and energy transfers by heat that could be avoided in a reversible engine? Assume complete combustion of the air–fuel mixture.

Q: What is the efficiency of an ideal heat engine that operates on a Carnot cycle between 70 °F and…

A: Given: Temperature, T1=70 °F  Temperature, T2= 1000 °F To determine the efficiency of an ideal heat…

Q: A spark-ignition engine has a compression ratio of 8, an isentropic compression efficiency of 85…

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Q: A Carnot engine has an efficiency of 0.93 and the temperature of its cold reservoir is 81 K. If the…

A: The efficiency of the heat engine is given by, η=WQH Here, W is the work output and QH is the heat…

Q: Consider a Carnot cycle executed in a closed system with 0.6 kg of air. The temperature limits of…

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Q: Calculate the Delta G value from the following data and state whether the process will be…

A: Temperature , T = 298 K  Change in entropy , ∆S = +9.50 J /K Heat of reaction ,∆H = -85 KJ To find =…

Q: An ideal gas heat engine operates in a Carnot Cycle between temperatures of 266°C and 115°C. It…

A: Given data: Thot = 266°C = 539 K Tcold = 115°C = 388 K   Solution: Efficiency = 1 - ( Tcold / Thot )…

Q: particular Carnot cycle has its exhaust temperature at 30.°C (303 K). During each cycle it takes in…

A: particular Carnot cycle has its exhaust temperature at 30.°C (303 K). During each cycle it takes in…

Q: The motor in a refrigerator has a power of 200W. If the freezing compartment is at 270 K and the…

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Q: The efficiency of a Carnot's cycle is 1/5. If on reducing the temperature of the cold body by 55°C,…

A: The efficiency of the Carnot engine whose initial and final temperatures are T1 and T2.The…

Q: The efficiency of a Carnot cycle is 1/5. If on reducing the temperature of the cold bodyby 55°C,…

A: Consider the initial temperature of the cycle be T1, and the final temperature of the cycle be T2.…

Q: An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air…

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Q: he thermal efficiency of a Carnot cycle operating between 170 ˚C and 62

A: Given:- A Carnot cycle operating between 170 ˚C and 620 ̊C Find:- The thermal efficiency of a Carnot…

Q: A heat engine (Carnot cycle ) has its intake and exhaust temperature of 157oC and 100oC,…

A: Given data :- Intake temperature T1 = 157° C = 430 K Exhaust temperature T2 = 100° C = 373 K

Q: The entropy of the working fluid of the ideal Carnot cycle (increases, decreases, remains the same)…

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Q: The energy transferred by heat from an engine during one cycle is 500 J. How much energy  must be…

A: The heat transferred or rejected from the engine is, QR=500 J   The efficiency, η=30%=0.30

Q: In any thermodynamic cycle, the total system energy is conserved. True or false?

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Q: A Carnot engine of efficiency 42% operates with a cold reservoir at 28°C and exhausts 1130 J of heat…

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Q: Calculate the efficiency of a Carnot engine working on an air-standard cycle with an 825oC…

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Q: In an experiment, 200 g of aluminum (with a specific heat of 900 J/kg K) at 100 C is mixed with 50.0…

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Q: An ideal Otto cycle with air as the working fluid has a compression ratio of 8. The minimum and…

A: The internal energy and relative specific volume at states 1 and 3 as determined from A-17E for the…

Q: In one cycle a heat engine absorbs 520 J from a high-temperature reservoir and expels 310 J to a…

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Q: A Carnot cycle operating between 770 K and 300 K produces 54 kJ of work. Compute the efficiency. O…

A: Given Temperature of source (T1) = 770K Temperature of sink (T2) = 300k

Q: A heat pump extracts 7.0 × 106 J of heat per hour from a well at 280 K and delivers its output heat…

A: write the equation for cofficient of performance of heat pump.Cop =QHWin =THTH  -TL…

Q: If we want to increase the efficiency of a Carnot engine, should the temperature of the hot…

A: Carnot Cycle The most efficient heat engine cycle is the Carnot cycle that consists of two…

Q: A gasoline engine has a compression ratio of 6.00 and uses a gas for which ? = 1.40. What is the…

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Q: A thermal cycle has an efficiency equal to 45.0 % of that a Carnot engine that operates between the…

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Q: Carnot engine whose low-temperature reservoir is at 17Chas an efficiency of 40%. By how much should…

A: Given:- T2 =17o C = 17 + 273 = 290 K n1 = 40% = 0.4 n2 = 50% = 0.5

Q: if a heat engine works in a Carnot cycle, what happens to its efficiency when the difference in…

A: Given Heat engine works in a Carnot cycle Difference in temperature of hot reservoir and cold…

Q: How much energy (in Joules) must be supplied to the machine to achieve this ta Sol. Since the…

A: GivenTemperature of cold site ,TC=0°C=273 KTemperature of hot site ,TH=24°C=24+273=297 KMass of…

Q: A heat engine operates at 48% of its maximum theoretical (Carnot) efficiency. If the temperature of…

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Q: A freezer sustains a cold environment of -26°C and exhausts its heat at 35°C. Assuming a Carnot…

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Q: Calculate the maximum possible efficiency of a heat engine that uses surface lake water at 20.7°C as…

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Q: Somebody claims to have developed a new reversible heat-engine cycle that has the same theoretical…

A: Second Carnot theorem says that all reversible heat engines will have same efficiency when operated…

Q: During the isothermal heat rejection process of a Carnot cycle, the working fluid experiences an…

A: The temperature of the heat sink,

Q: In one cycle a heat engine absorbs 520 J from a high-temperature reservoir and expels 310 J to a…

A:

Q: A four-cylinder spark-ignition engine has a compression ratio of 10.5, and each cylinder has a…

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Q: In a Carnot cycle if the heat added is 570 J and the heat rejected is 180 J then what is the work…

A: Last option is correct.

Q: A simple Brayton cycle using air as the working fluid has a pressure ratio of 10. The minimum and…

A: The enthalpy and the relative pressure at state 1 are determined by the given temperature and the…

Q: In a single cycle, a heat engine extrac from a hot reservoir and exhausts 5.0 cold reservoir. What…

A: Given Data : Heat extracted by hot reservoirQh=8 Kcal Heat exhausted into cold reservoirQc=5 cal