In Clausius theorem the reversible path is substituted by ________.

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  1. reversible isobars
  2. reversible isotherms
  3. reversible isochoric
  4. None of these

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Option 2 : reversible isotherms
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Clausius theorem states that: Any reversible path may be substituted by a reversible isotherm and a reversible adiabatic between the same end states such that the heat transferred during the isothermal process is the same as that transferred during the original process.

Substitution of a reversible process (i-f) by reversible adiabatic processes (i-a and b-f) and reversible isothermal process (a-b).

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