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Thermodynamics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsThermodynamics2 Marks
Question
A refrigerator cools a body cooler than its surroundings. Does this violate the law of conservation of energy?
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Answer

No, since the compressor works on the system to cool the body cooler than the surrounding. If W work is done to take $Q_2$ amount of energy from and pass $Q_1$ energy to the sink (surrounding) then, $W=Q_1-Q_2$

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