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Which of the following options represents correct sequence of True (T) or False (F) statements :
Statement-I: No Gibbs free energy change occurs for vapourisation at triple point. Statement-II: Entropy driven processes are spontaneous at high temperature.
Statement-III: $Δ G^{\circ}$ of a reaction will increase with increase in temperature if the reaction is
endothermic.

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TTT

FTF

TFF

'TTF

answer is B.

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Detailed Solution

ST-1 : At triple point all three states are in equilibrium with each other, hence

$Δ G_{vap} = 0$ .

$ST - 2 : Δ G = Δ H - T Δ S$

as T increases, $Δ G$ become more and more negative.

$ST - 3 : Δ G^{\circ} = - R T \ln K$

For endothermic reaction as T increases, K increases

$∴ Δ G^{\circ}$ will decreases as T increases.

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