A reaction occurs spontaneously if - Vidyadip

MCQ

A reaction occurs spontaneously if

A
$T\Delta S < \Delta H$ and both $\Delta H$ and $\Delta S$ are $+ve$
✓
$T\Delta S > \Delta H$ and both $\Delta H$ and $\Delta S$ are $+ve$
C
$T\Delta S = \Delta H$ and both $\Delta H$ and $\Delta S$ are $+ve$
D
$T\Delta S > \Delta H$ and $\Delta H$ is $+ve$ and $\Delta S$ is $-ve$

✓

Answer

Correct option: B.

$T\Delta S > \Delta H$ and both $\Delta H$ and $\Delta S$ are $+ve$

(b) For spontaneous reaction $\Delta G$ should be negative $\Delta G = \Delta H - T\Delta S = ( + ve) - T( + ve)$

If $T\Delta S > \Delta H$ then $\Delta G$ will be negative and reaction will be spontaneous.

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