For the process H2O(l)⇌H2O(g)(1bar,373K), the correct set of thermodynamic parameters is
A
△G=0,△S=+ve
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B
△G=0,△S=−ve
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C
△G=+ve,△S=0
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D
△G=−ve,△S=+ve
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Solution
The correct option is A△G=0,△S=+ve At 373K,H2O(l) is in equilibrium with H2O(g), and for an equilibrium process we know change in gibbs free energy is zero,
therefore △G=0.
As liquid phase is changes to gaseous phase sp molecules entropy increases therefore △S=+ive .