Chemical Thermodynamics Question 142

Question: At 300 K, the reactions which have following values of thermodynamic parameters occur spontaneously [Roorkee 1999]

Options:

A) $ \Delta G^{o}=-400kJmo{{l}^{-1}} $

B) $ \Delta H^{o}=200kJmo{{l}^{-1}},,\Delta S^{o}=-4J{{K}^{-1}}mo{{l}^{-1}} $

C) $ \Delta H^{o}=-200,kJ,mo{{l}^{-1}},\Delta S^{o}=4,J{{K}^{-1}}mo{{l}^{-1}} $

D) $ \Delta H^{o}=200,J,mo{{l}^{-1}},\Delta S^{o}=40,J{{K}^{-1}}mo{{l}^{-1}} $

Show Answer

Answer:

Correct Answer: A

Solution:

When $ \Delta H=+ve $ and $ \Delta S=-ve $ than the reaction is non-spontaneous.



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