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According to the Clausiu’s statement of the second law:
1. heat flows from cold surface to hot surface, unaided.
2. heat flows from hot surface to cold surface, unaided.
3. heat can flow from cold surface to hot surface with the aid of external work.
Which of the above statement is /are correct ?
  • a)
    2 only
  • b)
    1 and 3
  • c)
    2 and 3
  • d)
    3 only
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
According to the Clausiu’s statement of the second law:1. heat f...
Heat flows from hot to cold. ... It is important to emphasize that this statement of the 2nd law applies to the spontaneous flow of heat from hot to cold. It is possible, of course, to make a cool object in a warm place cooler - this is what a refrigerator does - but this involves the input of some external energy.

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Community Answer
According to the Clausiu’s statement of the second law:1. heat f...
Clausius never says that heat flows from hot surface yo cold surface , unaided...clausis says that heat cannot flow from from lower temperature to upper temperature without any external work...clausius actually describe a negative statement
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According to the Clausiu’s statement of the second law:1. heat flows from cold surface to hot surface, unaided.2. heat flows from hot surface to cold surface, unaided.3. heat can flow from cold surface to hot surface with the aid of external work.Which of the above statement is /are correct ?a)2 onlyb)1 and 3c)2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer?
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