A certain brand of freezer is advertised to use 730 kW . hof energy per year. (a) Assuming the freezer operates for 5 hours eachday, how much power does it require while operating? (b) If the freezerkeeps its interior at -5.0C in a 20.0C room, what is its theoreticalmaximum performance coefficient? (c) What is the theoretical maximumamount of ice this freezer could make in an hour, starting withwater at 20.0C?

A certain brand of freezer is advertised to use 730 kW . hof energy per year. (a) Assuming the freezer operates for 5 hours eachday, how much power does it require while operating? (b) If the freezerkeeps its interior at -5.0C in a 20.0C room, what is its theoreticalmaximum performance coefficient? (c) What is the theoretical maximumamount of ice this freezer could make in an hour, starting withwater at 20.0C?

Similar questions

A heat engine operates under the following conditions: heat exchanged via exhaust Qc = -2500 J, work done W = -1000 J. What is the efficiency of the engine? O 33% O 29% O 17% O 42% O 40%
A refrigerator has a coefficient of performance of 3.0. (a) If it requires 200 J of work per cycle, how much heat per cycle does it remove the cold reservoir? (b) How much heat per cycle is discarded to the hot reservoir?
A reversible heat pump can be utilized for heating in Winter and cooling in Summer. The Coefficient of Performance in heating mode is calculated as: COPheating = ΔQhot / W = Thot / (Thot – Tcold) How would you calculate then the COP in cooling mode?
(a) What is the work output of a cyclical heat engine having a 22.0% efficiency and 6.00×109 J of heat transfer into the engine? (b) How much heat transfer occurs to the environment?
Can you answer number 2?
A gasoline truck engine takes in 10,000 J of heat and delivers 2000 J of mechanical work per cycle. The heat is obtained by burning gasoline with heat of combustion Lc = 5.0 * 104 J/g. (a) What is the thermal efficiency of this engine? (b) How much heat is discarded in each cycle? (c) If the engine goes through 25 cycles per second, what is its power output in watts? In horsepower? (d) How much gasoline is burned in each cycle? (e) How much gasoline is burned per second? Per hour?
In one cycle of an engine, 1.71 k) of energy is absorbed from a hot reservoir at 277°C, and 1.22 kJ of energy is expelled to a cold reservoir at 27.0°C. (a) What is the engine's efficiency? (Enter your answer as a percent.) % (b) How much work (in J) is done by the engine in each cycle? (c) What is the power output (in kW) of the engine each cycle lasts 0.295 s? kW
An engine that has an efficiency of 25% takes in 200 J of heat during each cycle. If the engine completes 4 cycles per second, what is the power delivered? (power = rate of work done.) a) 50 w b) 200 w c) 12.5 w
A heat pump has a coefficient of performance equal to 4.85 and requires a power of 1.61 kW to operate. (a) How much energy does the heat pump add to a home in one hour? (b) If the heat pump is reversed so that it acts as an air conditioner in the summer, what would be its coefficient of performance?
A freezer with a coefficient of performance of 3.88 is used toconvert 1.75 kg of water to ice in one hour. The water starts at atemperature of 20.0 °C, and the ice that is produced is cooled toa temperature of -5.00 °C. (a) Howmuch heat is discarded into the room that houses the freezer?
One of the most efficient engines ever built is a coal-fired steam turbine engine in the Ohio River valley, driving an electric generator as it operates between 1,870°C and 430°C. (a) What is its maximum theoretical efficiency? % (b) Its actual efficiency is 42.0%. How much mechanical power does the engine deliver if it absorbs 1.35 x 105 J of energy each second from the hot reservoir? kW
A power plant operates with a heat-sourcereservoir at 350 and a heat-sink reservoir at 30 .It has a thermal efficiency equal to 55% of the Carnotengine thermal efficiency for the same temperatures.(a) What is the thermal efficiency of the plant?(b) To what temperature must the heat-sourcereservoir be raised to increase the thermal efficiency ofthe plant to 35%? Again η is 55% of the Carnot-enginevalue