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NEET2004ChemistryThermodynamics (C)Actual

Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is:

Options

  1. AS _ system + S _ surrounding >0
  2. BS _ system - S _ surrounding >0
  3. CS _ System >0 only
  4. DS _ Surroundings > only

Correct answer

A. S _ system + S _ surrounding >0

Step-by-step solution

According to Second Law of Thermodynamics, for a spontaneous process, total change in entropy (system + surrounding) should be positive. Related Theory (Ref. to Fig. 28.1) For the latter two cases, the temperature at which the spontaneity changes will be determined by the relative magnitudes of S and H .

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