A household refrigerator is .maintained at atemperature of 2°C. Every time the door isopened, warm material is placed insideintroducing an average of 420 kJ, but makingonly a small change in the temperature of therefrigerator. The door is opened 20 times aday and the refrigerator operates at 15% of theIdeal COP. The cost of the work is 4 rupeesper kWh. What is the monthly bill for thisrefrigerator? The atmosphere is at 30°C.

Answered: Image /qna-images/answer/cd4a5a5b-3c22-44c7-a600-384b305e3b2a.jpg

Answered: A household refrigerator is .maintained…

Similar questions

Before the quarantine, 23 candidates for passing PHY136 took the final exam, all in the same room. Each candidate had a power output of about 185W. At the start of the test, the temperature of the room was 66 ⁰F, and the room had dimensions of 21 ft by 45 ft by 11 ft. What was the temperature in the room at the end of the 75 minutes if all the energy remained in the air in the room and none wasadded by an outside source? The specific heat of air is 837 J/(kg ⁰C), and its density is about 1.3x10-3g/cm3.
Problem 8: A freezer has a coefficient of performance of 5.7. You place 0.45 kg of water at 21°C in the freezer, which maintains its temperature of -16°C. In this problem you can take the specific heat of water to be 4190 J/kg/K, the specific heat of ice to be 2100 J/kg/K, and the latent heat of fusion for water to be 3.34 ×105 J/kg. How much additional energy, in joules, does the freezer use to cool the water to ice at -16°C?
A gas trapped in a piston chamber expands by 0.141 m3 at a constant pressure of 1.00 atm. If 4.28 kJ of heat are also added to the gas, by how much does the internal energy of the gas change?
A mass of 1.5 kg of air at 120 kPa and 24°C is contained in a gas-tight, frictionless piston–cylinder device. The air is now compressed to a final pressure of 600 kPa. During the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. Calculate the work input during this process.
An internal combustion engine has the following characteristics: (a) the combustion chamber temperature is 1900 ᵒC; (b) the temperature in the exhaust chamber is 430 ᵒC; (c) with the consumption of the equivalent of 7.0 × 10⁹ cal of fuel the engine produces 1.4 × 10¹⁰ J of work in one hour. What is the thermal efficiency of this engine? I. 77% II. 68% III. 56% IV. 48% V. 37% VI. 25% If necessary, consider: R = 8.314 J/mol∙K1 cal = 4.19 Jkb =1,38 x 10⁻²³ m² kg s⁻² K⁻¹
A furnace supplies 36.0 kW of thermal power at 230 °C to an engine that exhausts waste energy at 20.0°C. At the very best, how much work W can the system do per second? W = J
Air is compressed in an adiabatic compressor reversibly from 60.0 kPa and 20°C to 750 kPa. What percentage of work input is transferred to the air as thermal energy or heat? (Round the final answer to three decimal places.) 0% of work input is transferred to the air as thermal energy or heat.
A sealed cylinder has a piston and contains 8.90×10^3 cm3 of an ideal gas at a pressure of 7.50 atm. Heat is slowly introduced, and the gas isothermally expands to 1.70×10^4 cm3. How much work (W) does the gas do on the piston?
A mole of an ideal gas of vibrating diatomic molecules at initial temperature T is expanded from an initial volume V to a final volume 2V in an isobaric process. Using the convention that heat is positive when it is absorbed by the system, what is the heat transfer Q in this process in terms of R and T?
Two engines operate between the same two temperatures of 787 K and 385 K, and have the same rate of heat input. One of the engines is a reversible engine with a power output of 23.0 kW. The second engine has an efficiency of 42.0%. What is the power output of the second engine?
A chemical reaction transfers 1250 J of thermal energy into an ideal gas while the system expands by 2.00 x 10-2 m3 at a constant pressure of 1.50 x 105 Pa. Find the change in the internal energy.
A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1atm from a volume of 5L to a volume of 10L. In doing so, it absorbs 400 J of thermal energy from its surroundings. Determine the change in internal energy of system.

SEE MORE QUESTIONS