The reversible engines are

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• One reversible heat engine operates between 1600 K & T₂ K & another reversible heat engine operates between T₂ K & 400 K. If both the engines have the temperature T₂ must be equal to
• According to Carnot’s theorem, all heat engines operating between a given constant temperature source and sink, none has a higher efficiency than a reversible engine.
• The efficiency of all reversible heat engines operating between the same heat reservoirs is
• For a reversible adiabatic process, the change in entropy is
• For any reversible process, the change in entropy of the system & surroundings is
• In a reversible cycle, the entropy of the system
• The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner is known as
• Which of the following is a reversible process?
• A heat engine is supplied with 250 kJ/s of heat at a constant fixed temperature of 227°C. The heat is rejected at 27°C. The cycle is reversible, if the amount of heat rejected is
• In a reversible cycle, the source temperature is 227°C & the sink temperature is 27°C. The maximum available work for a heat input of 100 kJ will be