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  •  Which of the following statement gives the correct criterion for the spontaneity of a process in the context of thermodynamic parameter S.Option:

 Which of the following statement gives the correct criterion for the spontaneity of a process in the context of thermodynamic parameter S.

Option: 1

\Delta S_{sys}\:\:>\:\:0\:\:only


Option: 2

\Delta S_{surr}\:\:>\:\:0\:\:only


Option: 3

\Delta S_{sys}\:\:-\:\:\Delta S_{surr}\:\:>\:\:0\:\:only


Option: 4

\Delta S_{sys}+\Delta S_{surr}\:\:>\:\:0\:\:only


Answers (1)

best_answer

The spontaneity of the reaction is decided by the total entropy change of the process and total entropy change is the sum of the system’s entropy and surrounding entropy  i.e.

\Delta S_{total}=\left ( \Delta S_{sys}+\Delta S_{surr} \right )

If  \Delta S_{total}\:\:>\:\:0  then the reaction is said to be spontaneous.

Hence, option number (4) is correct

Posted by

Divya Prakash Singh

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