what efficiency is the machine using in obtaining this result? % If your actual efficiency is 0.19, how many kcal did you really burn? kcal

Q: 170 g of water at 105°C is converted to steam. What is the entropy change of the water that is now…

A: latent heat of boiling water = 2256 KJ/kg  = 2256 J/g mass = 170 g Heat required to change the state…

Q: Air conditioners are rated by their coefficient of performance at 80°F inside temperature and 95°F…

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Q: In many refrigeration systems, the working fluid is pressurized in order to raise its temperature.…

A: Given that: Initial pressure (P1) = 140 kPa Final pressure (P2) = 1200 kPa Isentropic efficiency…

Q: Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 65 steps per…

A: Given data:Total time spent=30 min Rate of climbing=65 steps per minHeight of each step=8.0…

Q: An engine performs 920 J of work releasing 310 J of heat. Calculate the thermodynamic efficiency.

A: Given: Work.  = 920 J  Heat supplied =  310 J + 920  J = 1230

Q: Four operations in a manufacturing process represented as blocks are linked as shown. Each operation…

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Q: 1A) The amount of work that can be performed by a process under certain conditions is given by ∆G…

A: To obtain the conditions for processes where the Gibbs free energy is changing and the conditions…

Q: in the figure. The arrows of the curve indicate the direction of the process, and the points of…

A: As we know,Area under P-V curve is…

Q: The hot and cold reservoirs of a Carnot engine are 323°C and 66.7°C respectively. The temperature of…

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Q: Suppose you have an ideal refrigerator that cools an environment at -17.0°C and has heat transfer to…

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Q: What is Carnot efficiency Of a heat engine operating between the temperatures of 153°C And 19°C Give…

A: Carnot efficiency η=1-TCTH

Q: The heat of melting of ice at 1 atmosphere pressure and 0°C is 1.4363 kcal/mol. The volume of ice is…

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Q: A cyclical heat engine has 75 kJ of heat transfer that occurs to the enviornment for every 92 kJ of…

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Q: Four operations in a manufacturing process represented as blocks are linked as shown. Each operation…

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Q: What is its coefficient of performance?

A: Given:  Temperature of the refrigerator is -10.5∘C and the heat of the other environment is 60.0∘C…

Q: p (atm) Pmax 2 3 1 1 Isotherm V (cm 600 0+ 200 400

A: Take 1 mol of ideal monoatomic gas. Calculate isothermal work. W12=RT1lnV2V1=8.314 J/K.mol * 300…

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

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Q: a student adds heat to .350 kg of pure ice at 0.0 degree Celcius until it is completely melted (but…

A: Given data: The mass of ice is m=0.35 kg. Temperature of ice is t=0oC+273=273 K. The temperature of…

Q: How long would my car need to skid in order to melt my tires? The mass of the car is 1665 kg. 1.…

A: 1. To find the time it would take for the car's tires to melt, we need to use the equation for the…

Q: The coefficient of performance for a freezer is 7.8. a. How much heat must be extracted by the…

A: Given   Cop = n = 7.8  H1 = 2.3kJ  H3 = 330 J

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: A heat engine draws in 537 J of heat and expels 121 J of heat. a) Find the work produced by the heat…

A: Given Qi=537J Qe=121J

Q: An engine absorbed 780,600 J of energy from a reservoir that had a temperature of 714 K and expelled…

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Q: What is the coefficient of performance of an ideal heat pump that has heat transfer from a cold…

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Q: If the temperature inside the fridge is 35°F and the temperature outside is 70°F what is the maximum…

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Q: QI (ii) Figure QI (ii) a residential heat pump plant has a coefficient of Performance 2.4. Calculate…

A: Write the expression for the coefficient of performance of the heat pump. Here, HE is the heating…

Q: A certain refrigerator requires 31.0 J of work to remove 150 J of heat from its interior. What is…

A: Work done is The removed heat energy is Temperature of surrounding is Find:(a) The coefficient of…

Q: 2. In lecture, it was stated that the ideal efficiency of the Otto cycle is € = 1 -(V2/V) 1 where Vi…

A: Here is the Answer and Explanation

Q: What is the maximum coefficient of performance (COP) for a freezer that is set to maintain the cold…

A: The objective of the question is to calculate the maximum coefficient of performance (COP) for a…

Q: A PHYS 1510 student was working on a robotics project. The joints on the machine they were building…

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Q: The temperature of the cold reservoir of a refrigerator is -12 °C while in its hot reservoir is 33…

A: Given Sink temperature T2 = -12 oC = 273+(-12) = 261 K Source temperature T1 = 33 oC =273+33 =306 K

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 certain coal-fired power plant has a rated power capacity of P = 850 MW. The output of this plant…

A: Given that :- Power capacity , P=850 MW  Output , W=0.26Q11

Q: The temperature at the surface of the Sun is approximately 5,100 K, and the temperature at the…

A: temperature of surface of sun(TS)=5100 K Temperature of surface of earth(TE)=291K Energy(Q)=4.50 X…

Q: An engine has a hot-reservoir temperature of 900 K and a cold-reservoir temperature of 600 K. The…

A: We are given a heat engine. This heat engine is not Carnot engine. We are given the efficiency of…

Q: An engine does 25 J of work and exhausts 10 J of waste heat during each cycle. What is the engine's…

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Q: What is the coefficient of performance of an ideal heat pump that has heat transfer from a cold…

A: The coefficient of performance of ideal heat pump is given by, COP=THTH-TC Here, TH is the hot…

Q: The performance factor of a refrigerator is equivalent to (1/3) the performance factor of a Carno…

A: We have to calculate the amount of heat absorbed into the hot warehouse.

Q: 2.0Kg of water at 0 degree celcius heated to 100 degree celcius. Compute its change in entropy. Mc…

A: Check out the form of chemical

Q: The performance factor of a refrigerator is equivalent to (1/3) the performance factor of a Carno…

A: