A container filled with 45 kg of liquid water at 95C is placed in a 90-m3 room that is initially at 12C. Thermal equilibrium is established after a while as a result of heat transfer between the water and the air in the room. Using constant specific heats, determine (a) the final equilibrium temperature, (b) the amount of heat transfer between the water and the air in the room, and (c) the entropy generation. Assume the room is well sealed and heavily insulated.

Q: When an aluminum bar is temporarily connected between a hot reservoir at 630 K and a cold reservoir…

A: Given that: Heat transferred dQ = 2.60kJ  =2600J The temperature of the hot reservoir  Th= 630 K The…

Q: What is the decrease in entropy (in J/K) of 26.5 g of water that condenses on a bathroom mirror at a…

A:

Q: A real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of 510 K and 270…

A: Given-  T1 = 510 K T2 = 270 K W = 2.4 kJ Q= 37.6 kJ Part(a) The thermal efficiency of a real heat…

Q: A container with 41 g of a certain liquid (c = 4171 J/kg · °C, Lv=2224 kJ/kg) at 22 °C is heated up…

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Q: A 4.00 kg block of ice at 0.00 C falls into the ocean and melts. The average temperature of the…

A: The  change in entropy of the world is 60 J/K

Q: A piston/cylinder contains air assumed to be an ideal gas at 800 kPa and 300 K. The gas undergoes…

A: a) According to first law of thermodynamics dQ = dU + PdV  Since the process is isothermal  dU = 0…

Q: There is a 300-g covered aluminum cup at 25°F being filled with 190-g of water at 90°C. Equilibrium…

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Q: 20 g copper at 40 degree celsius is dropped into a constant volume calorimeter containing 100 g…

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Q: A 2.50 mol sample of an ideal gas expands reversibly and isothermally at 360 K until its volume is…

A: Number of mole of ideal gas is n=2.50 mol Temperature is T=360 K Gas expanded reversibly and…

Q: While doing exercise at a temperature of T = 37∘C, an athlete loses m = 0.50 kg of water per hour by…

A:

Q: 840 g of water (Cp = 4.186 J/g-K) is heated to 94 ⁰C at constant pressure. The resulting change in…

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Q: What is the decrease in entropy (in J/K) of 28.5 g of water that condenses on a bathroom mirror at a…

A: The temperature of a bathroom is, T=35 °C=308 K The mass of water is, m=28.5 g=0.0285 kg The amount…

Q: A 0.18-m3 rigid tank is filled with saturated liquid water at 120C. A valve at the bottom of the…

A: The volume of the tank,   The initial specific volume from A-4,

Q: An iron block of unknown mass at 185F is dropped into an insulated tank that contains 0.8 ft3 of…

A:

Q: A 5 kg block of ice initially at 268.15 K is placed in thermal contact with a very large reservoir…

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Q: Two constant-temperature reservoirs are kept in thermal contact with a 1.00 kg aluminum bar. One…

A: This problem can be solved using the formula for change in entropy.

Q: How much energy must be transferred as heat for a reversible isothermal expansion of an ideal gas at…

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Q: The surface of the Sun is approximately at = 700 K, and the temperature of the Earth’s surface is…

A:

Q: allowed to enter the cy he until the volume inci g constant specific hea

A: To find the entropy generation using the given values as,

Q: QUE STION FOUR: A light bulb operates at a temperature of 4,300 K and has an emissivity of 0.800 and…

A: Given, Temperature, T=4300K Area, A=5.5×10-6m2 Mass, m=2×10-3kg Initial Temperature, Ti=-30°C Final…

Q: A block made of nickel with a mass of 0.80 kg is heated to 800°C, then dropped into 5.00 kg of water…

A: Given: The mass of the nickel is mN=0.80 kg. The temperature of the nickel is TN=800∘C. The mass of…

Q: . One mole of an ideal gas expands isothermally at T = 20°C from 1.1 m³ to 2.1 m³. The gas constant…

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Q: (a) In reaching equilibrium, how much heat transfer occurs from 1.2 kg of water at 40°C when it is…

A: Entropy increases in a closed system, such as the universe. But in parts of the universe, for…

Q: A boulder with a mass of 75.0 kg, starting from rest, falls a distance of 20.0 m into a shallow…

A: Mass M = 75.0 kg Temperature T = 301 k Distance h= 20.0 m

Q: A 1.20 mol of an ideal gas at 350 K undergoes a free adiabatic expansion from V1 = 12.3 L to V2 =…

A:

Q: A 67.5-kg person typically eats about 2250 kcal per day, 21.0% of which goes to mechanical energy…

A:

Q: A 49.6 g block of copper whose temperature is 492 K is placed in an insulating box with a 107 g…

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Q: A mass of 25 lbm of helium undergoes a process from an initial state of 50 ft3/lbm and 60F to a…

A: Given: mass (m) = 25 lb initial temperature (T1) = 600 F =5200 R initial state(μ1) = 50 ft3/lbm…

Q: It takes about 335 J to melt one gram of ice. During the melting, the temperature stays constant.…

A: Given Data: Standard Data:

Q: 150 g liquid water at 80.0°C is placed in an insulated flask. A 12.0 g ice cube at 0°C is added to…

A: Given values: Mass of the water, mw=150 gTemperature of the water, Tw=80°C=353 KMass of ice, mi=12…

Q: (a)On a winter day, a certain house loses 5.33 10 ✕ 8J of heat to the outside. What is the total…

A: Heat loss from house = 5.33×108 jule Outdoor temp (T2) = 5.05°C =278.05k IIndoor temp (T1) = 24°C =…

Q: At the Olympic games, a 73.2 kg diver performs an inward straight dive in which she stands on the…

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Q: An 8.0 g ice cube at -10˚C is put into a Thermos flask containing 110 cm3 of water at 15˚C. By how…

A: Given that:Volume of water, Vw=110 cm3Mass of water, mw=110 cm3 × 1 g/ cm3=110g= 0.11 kgMass of ice,…