A refrigerator extracts 400 J of heat from a box during each cycle and rejects 600 J to a high-temperature reservoir. What is the coefficient of performance?

Q: reversible engine takes in heat at a rate of 555 W and exhausts heat at 482 W. How much power does…

A: Power output= 555-482 = 73

Q: An ideal heat engine takes in heat from a reservoir at 380 °C and has an efficiency of 28%: If the…

A: In first case temperature of hot reservoir = 380 degrees

Q: A heat pump has a coefficient of performance of 3.1. Hint   If it requires 290 J of work per…

A:

Q: One of the most efficient engines ever built is a coal-fired steam turbine engine in the Ohio River…

A: Given data The higher temperature is given as Th=1870°C. The lower temperature is given as…

Q: An engine transfers 2.00 x 103 J of energy from a hot reservoir during a cycle and transfers 1.50 x…

A:

Q: In one cycle, a heat engine takes in 1160 J of heat from a high-temperature reservoir and releases…

A: A heat engine is a thermodynamic-engine based on the second law of thermodynamics. The heat engine…

Q: An ideal, reversible heat pump is taking heat from the outside air at -11.5 °C and discharging it…

A: Given : Reversible heat pump is taking heat from the outside air at -11.5 °C.…

Q: A restaurant refrigerator has a coefficient of performance of 4.6. If the temperature in the kitchen…

A:

Q: A heat pump used to warm a home must employ a cycle that produces a working fluid at temperatures…

A: Temperature of heat reservoir is, TH=45°C     =318 K Temperature of cold reservoir is, TC=-15°C…

Q: Suppose you want to operate an ideal refrigerator that has a cold temperature of -8.5°C, and you…

A: Given data *The refrigerator has a cold temperature is TL = -8.50 C = (273 + (-8.5)) K = 264.5 K…

Q: In each cycle of its operation, a heat engine expels 2,500 J of energy and performs 1,900 J of…

A:

Q: what is the maximum possible coefficient of performance of a heat pump that brings energy from…

A: Given: Temperature, Th = 22o C = 273+22 = 295 K and Tc = 3o C = 273+3 = 276 K

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: A power plant operates at a 32.0% efficiency during the summer when the seawater used for cooling is…

A: Actual efficiency of the power plant in summer is

Q: lawn mower has a 6-horsepower engine (1 HP = 750 W). If the engine has an efficiency of 18%, and the…

A:

Q: The temperature of the cold and hot reservoirs between which a Carnot refrigerator operates are −73…

A: The coefficient of performance of a Carnot refrigerator is given by, Given,

Q: A heat pump removes 2060 J of heat from the outdoors and delivers 3060 J of heat to the inside of a…

A: Given data The heat removed by the pump is QL=2060 J The heat delivered by the house is QH=3060 J…

Q: An air conditioner operating between 93 F and 70 F is rated at 4000 Btu/h cooling capacity. Its…

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Q: A refrigerator operates between temperatures of 315 and 279 K. What would be its maximum coefficient…

A: η=QcW=QcQH-QC=Qc/QH1-QCQH

Q: What is the Carnot efficiency (in percent) of a heat engine operating between the temperatures of…

A: Given: T1=668K, T2=443K The Carnot efficiency of the heat engine operating between the given…

Q: Suppose a heat engine is connected to two energy reservoirs, one a pool of molten aluminum (660°C)…

A: This is a problem regarding the efficiency of an engine. The efficiency of an engine is given by the…

Q: What is the Carnot efficiency of a heat engine operating between the temperatures of 10 C and 100C?…

A:

Q: What is the best coefficient of performance possible for such a heat pump, if it has a hot reservoir…

A: The temperature of the hot reservoir is, TH=45.0°C+273=318 K The temperature of the cold reservoir…

Q: A heat engine operates between a hot reservoir at 500°C and a cold reservoir at 25°C. It has an…

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Q: A certain refrigerator has a coefficient of performance of 1.8. If this refrigerator absorbs…

A: Given data:  A certain refrigerator Coefficient of performance (COP) = 1.8 Heat absorbed (Qin) =…

Q: A refrigerator has a coefficient of performance of 4.0. When removing 2.4×104 J from inside the…

A:

Q: A heat engine operates between a reservoir at 15°C and one at 220°C. What is the maximum efficiency…

A: Given that: T1=2200CT2=150Cη=Efficiency=?

Q: A Carnot engine works at high temperature 710°F with the efficiency of 40.2%. If the efficiency of…

A: The efficiency of a carnot engine is given by η=1-TcoldThotTcold=Temeprature of cold sink (in…

Q: freezer has a coefficient of performance of 6.30. It is advertised as using 436 kWh/yr. Note: One…

A: Energy removed from fridge in a single day Q= 27468000 J

Q: A heat pump has a coefficient of performance equal to 4.05 and requires a power of 1.61 kW to…

A: coefficient of performance = α= 4.05 Power = P = 1.61 X 103 w