A refrigerator has a coefficient of performance of 2.0. In each cycle it absorbs 3.4×104 J of heat from the cold reservoir. During each cycle, how much heat is released to the high-temperature reservoir?

A refrigerator has a coefficient of performance of 2.9. Hint   If it requires 180 J of work per cycle, how much heat per cycle does the refrigerator remove from the cold reservoir? QL=QL= JJ How much heat per cycle is expelled into the hot reservoir? QH=QH= J

A heat pump has a coefficient of performance of 3.75 and operates with a power consumption of 715 W. (a) How much energy does it deliver into a home during 2 h of continuous operation? (b) How much energy does it extract from the outside air in 2 h? Need Help? Read It

A certain refrigerator has a coefficient of performance of 1.8. If this refrigerator absorbs 2.5x10^4 J of heat from the cold reservoir during each cyle, how much mechanical work is needed to run this refrigerator for each cyle? how much heat does the refrigerator dump into the hot reservoir during each cycle?

A particular power plant operates with a heat-source reservoir at 350°C and a heatsink reservoir at 30°C. It has a thermal efficiency equal to 55% of the Carnot-engine thermal efficiency for the same temperatures. What is the thermal efficiency of the plant? To what temperature must the heat-source reservoir be raised to increase the thermal efficiency of the plant to 35%? Again, η is 55% of the Carnot-engine value

A power plant operates at a 25.0% efficiency during the summer when the seawater used for cooling is at 20.0°C. The plant uses 360°C steam to drive turbines. If the plant's efficiency changes in the same proportion as the ideal efficiency, what would be the plant's efficiency in the winter, when the seawater is at 10.1°C? ______ %

An engine has a hot-reservoir temperature of 980 K and a cold-reservoir temperature of 550 K. The engine operates at three-fifths maximum efficiency. What is the efficiency of the engine?

You design an engine that takes in 1.50x104 J of heat at 650 K in each cycle and rejects heat at a temperature of 290 K. The engine completes 240 cycles in 1 minute. What is the theoretical maximum power output of your engine, in horsepower? 1 Watt = 1 Joule/s = 0.00134102 horsepower 44.5 hp 15.0 hp 6.50 hp 2.90 hp

Consider a heat pump that is used to cool down a home during the summer. Its coefficient of performance in cooling mode is 5.81. On a particularly hot day, the temperature outside the home is 90◦F, and the temperature inside the home is maintained at 70◦F. If the heat pump consumes 500 W of electrical power, at what rate does it remove heat (W) from the home?

A freezer has a coefficient of performance of 6.30. It is advertised as using 436 kWh/yr. Note: One kilowatt-hour (kWh) is an amount of energy equal to running a 1-kW appliance for one hour. Energy used in a single day - 4360000 J Energy removed from fridge in a single day - 27468000 (c) What maximum mass of water at 22.5°C could the freezer freeze in a single day (in kg)? (The latent heat of fusion of water is 3.33  105 J/kg, and its specific heat is 4186 J/kg · °C.)