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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Mock Test - Chemical Thermodynamics

  • question_answer
    In an irreversible process taking place at constant P and T in which only pressure-volume work is being done by the system, the change in Gibbs energy (dG) and change in entropy (dS) satisfy the criterion

    A)  \[{{(dS)}_{v,u}}=0,\,{{(dG)}_{T,P}}=0\]

    B)  \[{{(dS)}_{v,u}}=0,\,{{(dG)}_{T,P}}=+ve\]

    C)  \[{{(dS)}_{v,u}}=-ve,\,{{(dG)}_{T,P}}=-ve\]

    D)  \[{{(dS)}_{v,u}}=+ve,\,{{(dG)}_{T,P}}=-ve\]

    Correct Answer: D

    Solution :

    [d] for a spontaneous change (work is being done by the system) \[{{(dG)}_{T,P}}=-ve\] and \[{{(dS)}_{V,U}}=+ve\]


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