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JEE Advanced 2007Paper 2
Exam
JEE Advanced
Year
2007
Paper
Paper 2
Subject
Chemistry
Chapter
Thermodynamics (C)

JEE Advanced 2007 · Paper 2 · Chemistry · Thermodynamics (C)

For the process H_2 O(l) (1 bar, .273 ~K) H_2 O(g) (1 bar, .373 ~K)...

For the process H2O(l)\mathrm{H}_2 \mathrm{O}(\mathrm{l}) (1 bar, \left.273 \mathrm{~K}\right) \longrightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})(1bar,373 K)(1 bar, \left.373 \mathrm{~K}\right), the correct set of thermodynamic parameters is

Options

  1. AΔG=0,ΔS=+\Delta G=0, \Delta S=+ ve
  2. BΔG=0,ΔS=−ve\Delta G=0, \Delta S=-v e
  3. CΔG=+ve,ΔS=0\Delta G=+v e, \Delta S=0
  4. DΔG=−ve,ΔS=+ve\Delta G=-v e, \Delta S=+v e

Correct answer

A. ΔG=0,ΔS=+\Delta G=0, \Delta S=+ ve

Step-by-step solution

H2O(l)\mathrm{H}_2 \mathrm{O}(l) and H2O(g)\mathrm{H}_2 \mathrm{O}(g) both exist together at same temperature and pressure, suggests the state of equilibrium Hence, ΔG=0\quad \Delta G=0 and conversion of liquid into gas increases disorderness, entropy hence ΔS=+ve\Delta S=+v e.
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