A freezer has a coefficient of performance of 5.7. You place 0.45 kg of water at 21°C in the freezer, which maintains its temperature of -16°C. In this problem you can take the specific heat of water to be 4190 J/kg/K, the specific heat of ice to be 2100 J/kg/K, and the latent heat of fusion for water to be 3.34 ×105 J/kg. How much additional energy, in joules, does the freezer use to cool the water to ice at -16°C?

Q: A certain coal-fired power plant has a rated power capacity of P = 950 MW. The output of this plant…

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Q: Six kilograms of liquid water at 0° C is put into the freezer compartment of a Carnot refrigerator.…

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Q: Problem 4: A freezer has a coefficient of performance of 3.5. You place 0.25 kg of water at 33°C in…

A: GivenC.O.P=3.5 Mass of water, m=0.25 kgInitial Temperature of water, Ti=33°CFinal temperature of…

Q: 100 mL of water at 20.0 °C is placed in the freezer compartment of a refrigerator with a coefficient…

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Q: A. The food compartment of a refrigerator, shown in fig., is maintained at 4°C by emoving heat from…

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Q: 27. This problem compares the energy output and heat transfer to the environment by two different…

A: In the diagram, QS and QR is the heat supplied and heat rejected form the power stations…

Q: The ice maker inside a refrigerator makes ice cubes at 0.0°C from water that is at 17.2°C when it…

A: Given data The temperature of the water is Tw=17.2°C. The temperature of the ice is Ti=0°C. The…

Q: How much heat transfer occurs to the environment by an electrical power station that uses 1251014 J…

A: efficiency of the machine= 100% heat provided = Qin= 1.25x1014 J heat transferred to the environment…

Q: QUESTION 19 Consider N solar collectors (N= 12, 14, 16), of dimension [2m x 2m, 2m x 1.5 m, 2m…

A: A black body is an ideal object that absorbs all the radiation irrespective of its wavelength. Real…

Q: A freezer is to convert 1.5 kg of water at 27.9°C to 1.5 kg of ice at -4.42°C. If the coefficient of…

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Q: Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume…

A: From ideal gas law,Thus, we can find the internal energy to be,

Q: Thermodynamic Devices: An ideal reversible heat pump is taking heat from the outside air at -10.0°C…

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Q: 1. (a) How much heat transfer occurs to the environment by an electrical power station that uses…

A: Given: Heat transfer into the engine  Efficiency (η) = 41% = 0.41The Formula of efficiency 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 gasoline engine has a power output of 170 kW (about 2.28×105 hp ). Its thermal efficiency is 22.0…

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Q: The engine that powers a crane burns fuel at a temperature of 1500 oC. It is cooled by air at a…

A: by carnot's engine efficiency

Q: An electrical power plant is constructed to extract energy from the ocean. It utilizes warm water at…

A: Solution: Given: t1 = temperature of warm water = 30oC t2 = temperature of cold water = 4.1oC η1 =…

Q: A freezer is to convert 1.67 kg of water at 28.8°C to 1.67 kg of ice at - 4.8°C. If the coefficient…

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Q: 7. A central air conditioner removes heat at the rate of 44,500BTU/hr from inside of a house at…

A: Consider given data as below. Rate of heat remove, Qremove=44500 BTUhr Temperature inside house,…

Q: In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a…

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Q: Q1: A particular power plant operates with a heat-source reservoir at 370°C and a heat sink…

A: Given data, Temperature of the source = 3700C Temperature of the sink = 500C

Q: An electric power plant that would make use of temperature gradient in the ocean has been proposed.…

A: (a) The maximum efficiency of the system is the Carnot efficiency of the system. It is given by :

Q: Two engines operate between the same two temperatures of 787 K and 385 K, and have the same rate of…

A: Given, Power output of one engine, P1 = 23.0 kW efficiency of second engine, η2 = 42.0% Two engines…

Q: The rate of heat leaking into a house from the warmer outdoors is given by A(TH – TC) where TC and…

A: The rate of heat leakingR=A(TH -TC)where TH is the indoor temperature and TC is the outdoor…

Q: She ice maker inside a refrigerator makes ice cubes at 0.0°C from water that is at 14.7°C when it…

A: Power = 244 WCoefficient of performance = 3.56 P = 244 * 3.56 P = 868.64 Wt = 24 hours t = 24 * 60 *…

Q: m = 0.593 kg of methanol in atmospheric pressure is heated with an electric heater from T₁ = 30.2 °C…

A: Y

Q: The rate of heat leaking into a house from the warmer outdoors is given by A(TH – TC) where TC and…

A: Power required = A × ( Tout - T in )Power required ratio Ratio = power required at 25°C ÷ powe…

Q: You decide to use your body as a Carnot heat engine. The operating gas is in a tube with one end in…

A: Given : Given: Temperature end at the mouth = 370 C The temperature at other end = 300 C To find…

Q: Problem 2:   This problem compares the energy output and heat transfer to the environment by two…

A: Given data: Efficiency of first station η1=36% Efficiency of second station η2=47% Heat Q1=2.5×1014…

Q: Solar PV systems have large potential to produce large amounts of electricity in desert regions such…

A: Given data, Total electricity need = 28x109 kW-H/year Solar insolation = 2400 kW-H/year Solar cell…