A reaction, $A + B ⟶ C + D - q$ , is found to have a positive entropy change, the reaction will be:

possible at high temperature

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possible only at low temperature

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not possible at any temperature

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possible at any temperature

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Solution

The correct option is A possible at high temperature
As reaction is endothermic,
$A + B ⟶ C + D - q$
so $Δ H = + v e$
and if entropy change is positive then $Δ S = + v e$
so $Δ G = Δ H - T Δ S < 0$ at high temperature and reaction will be possible at high temperature only.

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A reaction, A+B⟶C+D−q, is found to have a positive entropy change, the reaction will be:

The correct option is A possible at high temperatureAs reaction is endothermic,A+B⟶C+D−qso ΔH=+veand if entropy change is positive then ΔS=+veso ΔG=ΔH−TΔS<0 at high temperature and reaction will be possible at high temperature only.

A reaction, $A + B ⟶ C + D - q$ , is found to have a positive entropy change, the reaction will be:

The correct option is A possible at high temperature
As reaction is endothermic,
$A + B ⟶ C + D - q$
so $Δ H = + v e$
and if entropy change is positive then $Δ S = + v e$
so $Δ G = Δ H - T Δ S < 0$ at high temperature and reaction will be possible at high temperature only.