A refrigerator has a coefficient of performance of 2. The ice (cice = 2090 J/kg.oC) tray compartment is at –19°C, and the room temperature is 45°C. The refrigerator can convert 5.47 g of water (cwater = 4186 J/kg.oC) at 45°C to 5.47 g of ice at –19°C each minute. What input power (in W) is required? (Answer in 2 decimal places)

A refrigerator has a coefficient of performance of 2. The ice (cice = 2090 J/kg.oC) tray compartment is at –19°C, and the room temperature is 45°C. The refrigerator can convert 5.47 g of water (cwater = 4186 J/kg.oC) at 45°C to 5.47 g of ice at –19°C each minute. What input power (in W) is required? (Answer in 2 decimal places)

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter18: Heat Engines, Entropy, And The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 18P

See similar textbooks

Similar questions

A refrigerator has 18.0 kJ of work done on it while 115 kJ of energy is transferred from inside its interior. What is its coefficient of performance? (a) 3.40 (b) 2.80 (c) 8.90 (d) 6.40 (e) 5.20
Show that the coefficients of performance of refrigerators and heat pumps are related by COPref=COPhp1. Start with the definitions of the COP s and the conservation of energy relationship between Qh, QC, and W.
A refrigerator has 18.0 kJ of work clone on it while 115kJ of energy is transferred from inside its interior. What is its coefficient of performance? (a) 3.40 (b) 2.80 (c) 8.90 (d) 6.40 (e) 5.20
A refrigerator has a coefficient of performance of 3.00. The ice tray compartment is at 20.0C, and the room temperature is 22.0C. The refrigerator can convert 30.0 g of water at 22.0C to 30.0 g of ice at 20.0C each minute. What input power is required? Give your answer in watts.
What is the Carnot efficiency (in percent) of a heat engine operating between the temperatures of 355°C (628 K) and 200°C (473 K)?
250 mL of water at 20.0 ∘C is placed in the freezer compartment of a refrigerator with a coefficient of performance of 4.00. How much heat energy is exhausted into the room as the water is changed to ice at -5.00 ∘C?
What is the maximum efficiency of a heat engine whose operating temperatures are 660C and 340 C?
A freezer needs an input power of 93.6 W to convert 1.80 kg of water at 25.0°C to 1.80 kg of ice at −25.0°C in one hour. What is the coefficient of performance of the freezer? An inventor is marketing a device and claims that it takes 25. 00 kJ of heat at 327.00°C and discards heat to the environment at 27.00°C. What is the maximum possible efficiency of this engine?
What volume of water at 0°C can a freezer make into ice cubes in 1.0 h, if the coefficient of performance of the cooling unit is 6.0 and the power input is 1.2 kilowatt
A gasoline engine has a power output of 30 kW (40 hp) and an efficiency of 22% .Decide best due to heat power and best removed from heat power ? What is the maximum work that can be obtained from 1.0 kg of air with the temperature 700◦C and the pressure 100 atm in an environment that holds 1atm and 25◦C?
A refrigerator has a coefficient of performance of 3.25. How much work must be suppliedto this refrigerator in order to remove 261 J of heat from its interior?
A restaurant refrigerator has a coefficient of performance of 4.6. If the temperature in the kitchen outside the refrigerator is 32°C, what is the lowest temperature that could be obtained inside the refrigerator if it were ideal?