PhysicsHardHigh School (11–12)Heat & Thermodynamics › Heat Engines, the Second Law and EntropyJEE AdvancedJEE Main
Created by StemPy LabIn winter, a heat pump keeps a house at when it is outside. It takes heat from the outside air and delivers of heat into the house. Treat it as an ideal (Carnot) machine, and take as . What electrical power does it need?
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← One mole of an ideal monatomic gas is warmed by 100 K in a process for which its molar heat capacity stays equal to 3R. Take R = 8.3 J/(mol K). How much work does the gas do in this process? Give the answer in J.A Carnot engine takes in 1000 J of heat from a reservoir at 500 K and gives out heat to the surroundings at 300 K. All the work it does drives a Carnot refrigerator, which takes heat from a cold store at 250 K and gives it out to the same surroundings at 300 K. How much heat does the refrigerator take from the cold store? Give the answer in J. →
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