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JEE Advanced2007ChemistryThermodynamics (C)Actual

For the process H ₂ O ( l ) (1 bar, .273 ~K ) H ₂ O ( g ) (1 bar, .373 ~K ) , the correct set of thermodynamic parameters is

Options

  1. AG=0, S=+ ve
  2. BG=0, S=-v e
  3. CG=+v e, S=0
  4. DG=-v e, S=+v e

Correct answer

A. G=0, S=+ ve

Step-by-step solution

H ₂ O (l) and H ₂ O (g) both exist together at same temperature and pressure, suggests the state of equilibrium Hence, G=0 and conversion of liquid into gas increases disorderness, entropy hence S=+v e .

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