An ice chest is constructed of Styrofoam (k = 0.033 W/moC) with inside dimensions of 25 by 40 by 100 cm. The wall thickness is 5.0 cm. The outside of the chest is exposed to air at 25oC with h = 10 W/moC. If the chest is completely filled with ice, calculate the time for the ice to completely melt. State all assumptions. The heat of fusion for water is 330 kJ/kg. (hint: ‘unwrap’ the box as

Q: An insulated cup of water (145g water) at room temp (20C), is warmed by a 25g sample of aluminum at…

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Q: A 2.44 m wide by 1.15 m high metal plate must be insulated to prevent contact burn injuries. If the…

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Q: In a nuclear power plant, a 1.0 kg of water at 61.7 °C is converted into 1.0 kg of steam at 133.2…

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Q: MA 1.0-mol sample of an ideal gas is kept at 0.0°C during an expansion from 3.0 L to 10.0 L. (a) low…

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Q: A metal tank with volume 3.10 L will burst if the absolute pressure of the gas it contains exceeds…

A: We are aware that the metal tank has a 3.10 L capacity, a 100 atm absolute gas pressure, 11 mol of…

Q: The mass of a monoatomic gas can be computed from its specific heat at constant volume cy. (Note…

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Q: What is the heat capacity of a system consisting of 8.10 kg of water in a 0.310-kg aluminum bucket?…

A: Write the given values with the suitable variables. mw=8.10 kgma=0.310 kgCa=0.9 kJ/kg KCw=4.186…

Q: In a one-shell and two-tube heat exchanger, cold water with inlet temperature of 20°C is heated by…

A: Consider that the heat exchanger is completely insulated.   The temperature variation occurs in 1-D…

Q: next 5 questions are inter-related. A jet fighter is flying at 40.000 ft at M-0.9. The intet pres is…

A: Height, h = 40000 ft M = 0.9 Inlet pressure, P = 2.73 psia Temperature, T = -69.7° F

Q: Geothermal steam at 172°C condenses in the shell side of a heat exchanger over the tubes through…

A: Given,temperature of the steam, Ts = 172 °Cdiamete of the tube, d = 4 cmlength, L = 9.5 mtemperature…

Q: law firm they make their morning coffee in an aluminum cup. The cup has a mass of 0.13 kg and is…

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Q: Lake Erie contains roughly 4.00 × 1011 m3 of water. (a) How much energy is required to raise the…

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Q: 6.5 m3 of air at a pressure of 170000 Pa at 75O C is cooled to 41O C at a pressure of 130000 Pa .…

A: Given data:  Initial Volume (V1) = 6.5 m3 Initial Pressure (P1) = 170000 Pa Initial temperature (T1)…

Q: The concrete sections of a certain superhighway are designed to have a length of 24.0 m. The…

A: The length of the concrete superhighway is L = 24.0 m The initial temperature of the concrete is T1…

Q: One end of an insulated metal rod is maintained at 100.0°C,and the other end is maintained at 0.00°C…

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Q: An insulated beaker with negligible mass contains a mass of 0.300 kg of water at a temperature of…

A: Given data: Mass of the water, mw=0.3 kg Initial temperature of water, Ti=640C Specific heat of…

Q: During an intense 30-minute fat-burning workout class, the instructor maintains an average power…

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Q: A fixed mass of gas at a pressure of 1.0 x 105 Pa and temperature T, is heated at constant pressure…

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Q: A cylinder of fixed capacity 44.8 litres contains helium gas at standard temperature and pressure.…

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Q: In a nuclear power plant, a 1.0 kg of water at 35.9 °C is converted into 1.0 kg of steam at 151.9…

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Q: A piston–cylinder device contains steam initially at 1 MPa, 450oC, and 3.0 m3. Steam is allowed to…

A: Given : P1=106Pa, T1=4500C, V1=3m3 Using the steam table at the given initial pressure and…

Q: 20. . Show that 1.00 mol of ideal gas under STP occupies final 20. *. a volume of 0.0224 m³ = 22.4…

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Q: A hot air balloon and its cargo (not including the air inside) have mass of 120 kg. The temperature…

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Q: Two 20.0 g ice cubes at -13.0 °C are placed into 245 g of water at 25.0 °C. Assuming no energy is…

A: Given:Total mass of ice cubes Initial temperature of ice cubes Mass of water Initial temperature of…

Q: You drop a 7 mole piece of zinc, which has been heated to 423 K into 0.101 kg of water at 300 K You…

A: In the following problem: Number of mole of Zinc, n=7 Temperature of Zinc, TZn=423 K Mass of the…

Q: heat transfer rate

A: Given: Width of plate is W=2.37 m Height of plate is H=1.17 m Heat transfer rate is Q·=123 W Initial…

Q: The bottom of an aluminum pot is 0.01 m thick and 0.1 m2 in cross-section. The lower surface is kept…

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Q: A lead rod has a Volume of 148.7 cu meter when the temperature is 11.9°C khat is its volume (in…

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Q: A 1.82 m wide by 1.11 m high metal plate must be insulated to prevent contact burn injuries. If the…

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Q: An unknown metal has a change in length of 0.01 m given a beam length of 3 m and a temperature…

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Q: Radiant heat makes it impossible to stand close to a hot lava flow. Calculate the rate of heat loss…

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Q: An electric stove burner has surface area 325 cm² and emissivity e = 1. The burner consumes 1500 W…

A: We are aware that an electric stove burner has a surface area of 325 cm2, an emissivity of 1,…

Q: Following vigorous exercise, the internal body temperature of a 69.5-kg person is 40.0°C.  At what…

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Q: A large cylindrical tank contains 0.750 m3 of nitrogen gas at27C and 7.50 * 10^3 Pa (absolute…

A: Boyle's law states that the pressure of an ideal gas is inversely proportional to its volume at…

Q: 53. At the start of a trip, a driver adjusts the absolute pressure in her tires tobe 2.81 3 105 Pa…

A: Given Data: The initial pressure is, Pi = 2.81 x 105 Pa. The final pressure is, Pf = 3.01 x 105 Pa.…

Q: A cheese ripening room which, has a total surface area of A = 25.0m², has to ensure that the inside…

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Q: An air conditioner with refrigerant 134a is used as a working fluid to maintain a room at 23oC by…

A: Given: room temperature(Tr)=(23oC+273K)=296K surrounding temperature(Ts)=(37o+273K)=310K heat…

Calorimetry

Measuring the heat transferred during chemical reactions or other physical processes is known as calorimetry. It comes under the branch of thermochemistry.