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The efficiency of a Carnot cycle is 1//6...

The efficiency of a Carnot cycle is `1//6`. By lowering the temperature of sink by `65 K`, it increases to `1//3`. The initial and final temperature of the sink are

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`325K, 260K`
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PRADEEP-THERMODYNAMICS-Problems for practice
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  5. A reversible engine takes in heat from a reservoir of heat at 527^(@)C...

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  7. Efficiency of a carnot engine is 0.4, when temp. of sink is 300K. What...

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  8. A perfect carnot engine has source temp. 227^(@)C and sink temp. 127^(...

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  9. An ideal engine operates by taking in steam from a boiler at 327^(@)C ...

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  10. Two carnot engines A and B are operated in series. The first one A rec...

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  11. A carnot engine is designed to operate between 480K and 300K. Assuming...

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  12. A carnot engine absorbs 2000J of heat from the source of heat engine a...

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  13. In a refrigerator, heat from inside at 270K is transferred to a room a...

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  14. Assuming that a domestic refrigerator can be regarded as a reversivle ...

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  15. In a cold storage, ice melts at the rate of 2 kg//h when the external ...

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  16. A refrigerator, whose coefficient performance beta is 5, extracts heat...

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  17. A refrigerator freezes 5 kg of water at 0^(@)C into ice at 0^(@)C in a...

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  18. Calculate the least amount of work that must be done to freeze one gra...

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  19. Refrigerator A works between- 10^(@)C and 27^(@)C while refrigerator B...

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  20. In a refrigerator, heat from inside at 277 K is transferred to a room ...

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