The effect of temperature on the spontaneity | vedclass

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Question

(D) The spontaneity of a reaction is determined by the Gibbs free energy equation: $\Delta G = \Delta H - T \Delta S$.For a reaction to be spontaneous

Vedclass · Accepted Answer

$A$ and $C$ only

Vedclass · Answer

(D) The spontaneity of a reaction is determined by the Gibbs free energy equation: $\Delta G = \Delta H - T \Delta S$.For a reaction to be spontaneous,$\Delta G $1$. If $\Delta H > 0$ and $\Delta S $2$. If $\Delta H > 0$ and $\Delta S > 0$,then $\Delta G $3$. If $\Delta H $4$. If $\Delta H  0$,then $\Delta G$ is always negative,so the reaction is spontaneous at all temperatures ($D$ is correct).Thus,conditions $A, C,$ and $D$ are correct. However,based on the provided options,the combination $A$ and $C$ is the most appropriate match.

Condition	Details
$A$. $\Delta H: +, \Delta S: -$	$T$: any $T$,Spontaneity: Non-spontaneous
$B$. $\Delta H: +, \Delta S: +$	$T$: low $T$,Spontaneity: Non-spontaneous
$C$. $\Delta H: -, \Delta S: -$	$T$: low $T$,Spontaneity: Spontaneous
$D$. $\Delta H: -, \Delta S: +$	$T$: any $T$,Spontaneity: Spontaneous

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