A refrigerator is rated at 370 Watt. What is the maximum amount of heat it can remove in 1 min if the inside of the refrigerator is 0°C and it exhausts into a room at 20°C. If the COP of the refrigerator is 70% of that of an ideal heat pump, how much heat can it remove in 1 min?

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…

A:

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: Safiya tried to store a tray of ice cubes in a freezer at a room temperature of 32°C. By assuming…

A:

Q: What is the change in internal energy of a system that takes in 3.33 106 J of heat, and does 4.50…

A: According to the first law of thermodynamics,∆U=Q-W.......(1)Where,∆U is the change in internal…

Q: A piston-cylinder assembly contains 0.7 lb of air initially at a pressure of 30 lbf/in² and a…

A: Given: Let us consider the given data, Air's mass, m=0.7 lb Initial pressure, P1=30 lbfin2 Final…

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: A system gains 2990 J of heat at a constant pressure of 1.23 × 105 Pa, and its internal energy…

A:

Q: During a high fever, a 55.0 kg patient’s normal metabolism increases by 11.2%. This results in an…

A: Given that:m=55.0 kgMetabolism with fever is 11.2% greater. H=20.0 mAt normal, Qc=120 kJ

Q: We heat water in a pool with dimensions 10 × 5.0 × 2.0 m3 with a heater so that the temperature is…

A: Given data V=100 m3T1=10 KT2=0.005 Kt=5 min

Q: Air under pressure of 100 kPa at 280 K enters the compressor and is stably compressed to 600 kPa and…

A:

Q: Three different processes act on a system. In process A, 42 J of work are done on the system and 77…

A: If the system undergoes 42 J of work and receives 77 J of heat, we must calculate the system's…

Q: A cyclic thermodynamics process for an ideal gas has gone through four steps. The amount of heat…

A: given: Q1=5960 JQ2 = -5600 JQ3 = -3000 JQ4 = -4870 J∆U1 = 3670 J∆U2 = -4800 J∆U3 = -1800 J

Q: A gasoline engine takes in 1.61×104 J of heat and delivers 3700 J of work per cycle. The heat is…

A:

Q: During a compression process, work of 20 Kj is done on a system while the system transfers 13 Kj of…

A: According to 1st law of thermodynamics, Here, ΔU, Q and W represent the change in internal energy,…

Q: You perform maintenance on an engine, increasing its efficiency by 9.86 %.  How much more work is…

A: Given:- The efficiency of the engine is increasing by 9.86 %. The heat input is 1367 J  Find:- How…

Q: An ideal heat pump does 400 J of work to keep the temperature in a dorm room at 20◦ C by dumping…

A:

Q: Work of 3000 J is done on an ideal gas, but the internal energy raises only 1600 J. What is the…

A:

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: In an adiabatic process, 550 J of net work is done on a gas to significantly reduce its volume.…

A: Given Net work done on the gas= 550 J Process is adiabatic

Q: You add 3181 J of heat to a system at constant pressure of 2.78 x105 Pa.  While doing so, its…

A: Given: Heat, Q = 3181 J pressure, p = 2.78 X 105 Pa Internal energy, U=6300 J

Q: A system does 137 J of work on its environment and gains 95.3 J of heat in the process. Find the…

A: The work done by the system on the environment,

Q: You are boiling water in a pot on the stove for your tea. Being the brilliant scientist you are, you…

A: Given. The 0.1 kg of water in a pot is boiling at 100 degrees celsius. In the process of boiling the…

Q: If a carnot engine operates between 35 degrees celcius to 76 degrees celcius. What is its thermal…

A:

Q: A system gains 3080 J of heat at a constant pressure of 1.28 × 105 Pa, and its internal energy…

A:

Q: A steam-electric power plant delivers 900 MW of electric power. The surplus heat is exhausted into a…

A: The amount of heat exhausted into the river can be calculated using the equation,

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: You add 1285 J of heat to a system at constant pressure of 2.77 x105 Pa.  While doing so, its…

A: Given, 1285 J heat is added to the system so Q=+1285 J The constant pressure is P=2.77 x105 Pa…

Q: If an engine operates between 269°C and 26°C, what is its maximum thermodynamic efficiency (as a…

A:

Q: A system gains 3310 J of heat at a constant pressure of 1.38 × 105 Pa, and its internal energy…

A: Write the given values with suitable variables.

Q: A gas is compressed inside a cylinder with an average force of 40 N acts to move the piston 0.20 m.…

A:

Q: A Carnot's refrigerator takes heat from water at 0°C and discards it to a room at 27°C. If 1 kg of…

A: The objective of the question is to find out the amount of heat discarded to the room, the work done…

Q: A steam engine is operating at its theoretical maximum efficiency of 48%. If the waste heat has a…

A: Given data: The maximum efficiency is η=48% The temperature of the waste heat is T1=31°C+273=304 K…

Q: A furnace supplies 36.0 kW of thermal power at 230 C to an engine that exhausts waste energy at 20.0…

A:

Q: A heat engine takes in 2500J and does 1500J of work.   a) How much energy is expelled as waste?…

A: Given Data: The heat supplied to the engine is: Qs=2500 J The work produced by the engine is: W=1500…

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: An automobile engine provides 626 Joules of work to push the pistons. In this process the internal…

A: Given : change in internal energy, ΔU = -2946 J             Work done by engine, W = 626 J

Q: A system with a piston expands when it gives off  51.9J of heat to the surroundings. The piston is…

A:

Q: While constant total pressure = 4.5 atm, an ideal gas grows from 500ml to 900ml. After, the heat…

A: Work done at constant pressure W = P∆V work done at constant volume  W=0 because change in volume is…

Q: A gas at 0.75 atm with a volume of 21.7 L undergoes a quasi-static isobaric expansion. If during…

A: Given:-  A  gas has a pressure P = 0.75 atm  The volume of the gas is V = 21.7 L  The gas undergoes…

Q: A closed gas system has 682 J of heat gain from the environment and 439 J of work is done on the gas…

A: Given data Q=+682 JW=-439 J

Q: An ideal heat pump is being considered for use in heating an environment with a temperature of…

A: Coefficient of performance of heat pump is,  CP=THTH-TC Here, TH is hot and TC is cold temperatures.…

Q: In a process of an ideal gas, the pressure is halved while the volume is kept constant. During this…

A: An ideal gas Pressure is halved, Volume is kept constant, Heat flow,