Question

For spontaneous reaction or the reaction at equilibrium which of the following is wrong?

• A. $ \Delta H < T \Delta S $ reaction is exothermic and $ T\Delta S $ is + ve
• B. $ \Delta H=-ve,\,T\Delta S=0 $
• C. $ \Delta H=\,T\Delta S $
• D. $ \Delta H=-ve,\,\,T\Delta S=-ve $

Answer 1

Answer: (A)

For a reaction to be spontaneous on the reaction at equilibrium:
$\Delta H=-v e \Delta S=+v e$
$\Delta G=\Delta H-T \Delta S=-v e$
So, $ \Delta H < T \Delta S$,
reaction is exothermic and $T \Delta S$ is $+ ve$ statement is wrong