Kelvin-Planck's law deals with conversion of which of the following?

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  1. Work
  2. Heat
  3. Mass
  4. Heat into work

Answer (Detailed Solution Below)

Option 4 : Heat into work
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Detailed Solution

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Explanation:

Kelvin Planck's Law: It is impossible for any system to operate in a thermodynamic cycle and deliver a net amount of work to its surroundings while receiving energy by heat transfer from a single thermal reservoir.

  1. It gives the concept of heat engine hence, it is a conversion of heat into work.

Important Points

Thermal reservoir: it is a special kind of system that always remains at a constant temperature even though energy is added or removed by heat transfer.

Heat Engine: Heat engine works on Kelvin Planck’s statement of the second law of thermodynamics.

  1. heat engine is a reversible engine working in a cycle produces net work while operating between two thermal reservoirs.
  2. A heat engine produces work while exchanging heat from a higher temperature to a lower temperature reservoir.

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Additional Information

Clausius statement: It is impossible for any system to operate in such a way that the sole result would be an energy transfer by heat from a cooler to a hotter body.

  1. Refrigeration is based on Clausius's statement of the second law of thermodynamics.

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