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"Heat cannot by itself flow from a body ...

"Heat cannot by itself flow from a body at lower temperature to a body at higher temperature" is a statement or consequence of

A

second law of thermodynamics

B

conservation of momentum

C

conservation of mass

D

first law of thermodynamics

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The correct Answer is:
A
This is a statement of second law of thermodynamics.
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DISHA PUBLICATION-THERMODYNAMICS -EXERCISE-1 : CONCEPT BUILDER (Topic-3 CARNOT ENGINE, REFIGERATOR AND SECOND LAW OF THERMODYNAMICS)
  1. A Carnot enginer abosrbs an amount Q of heat from a reservoir at an ab...

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  2. If an air conditioner is put in the middle of a room and started worki...

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  3. A carnot engine takes in 3000 kcal of heat from a reservoir at 627°C a...

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  4. In Carnot engine, efficiency is 40% at hot reservoir temperature T. Fo...

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  5. "Heat cannot by itself flow from a body at lower temperature to a body...

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  6. The temperature-entropy diagram of a reversible engine cycle is given ...

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  7. An ideal Carnot's engine whose efficiency 40% receives heat of 500K. I...

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  8. A heat engine has an efficiency eta.Temperatures of source and sink ar...

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  9. The cofficient of performance of a refrigerator is 5. If the temperatu...

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  10. If the energy input to a Carnot engine is thrice the work it performs ...

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  11. An engine operates by taking n moles of an ideal gas through the cycle...

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  12. An ideal gas heat engine operates in Carnot cycle between 227^(@)C and...

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  13. A carnot engine takes 300 cal. of heat at 500 k and rejects 150 cal o...

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  14. A refrigerator works between 0°C and 27°C. Heat is to be removed from ...

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  15. A reversible engine converts one-sixth of the heat input into work. Wh...

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