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In an adiabatic process the quantity which remains constant is :-
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Important Questions on Thermodynamics
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calories of heat is supplied to raise the temperature of of air from to without any change in its volume. The change in internal energy per gram of air is,
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According to the second law of thermodynamics:
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"Heat cannot flow by itself from body at lower temperature to a body at higher temperature" is a statement or consequence of
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A Carnot engine takes of heat from a reservoir at , and gives it to a sink at . The work done by the engine is
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A reversible refrigerator operates between a low temperature reservoir at TC and a high temperature reservoir at TH. Its coefficient of performance is given by :
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A carnot engine shows efficiency of 40% on taking energy at 500 K. To increase the efficiency to 50%, at what temperature it should take energy?
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A Carnot engine whose efficiency is takes in heat from a source maintained at a temperature of . It is desired to have an engine of efficiency . Then the intake temperature for the same exhaust (sink) temperature must be,
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If the system takes 100 cal. heat, and releases 80 cal to sink, if source temperature is 127ºC find the sink temperature :-
