In a reaction, $Δ H$ and $Δ S$ both are more than zero. In which of the following cases, the reaction would not be spontaneous?

Δ H > T Δ S

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T Δ S > Δ H

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Δ H = T Δ S

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Δ G < 0

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Solution

The correct options are
A $Δ H > T Δ S$
C $Δ H = T Δ S$
As we know,
$Δ G = Δ H - T Δ S$
and reaction will be spontaneous if $Δ G < 0$
so reaction will be spontaneous only if
$T Δ S > Δ H$ .

Suggest Corrections

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