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Heat of Reaction

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Question

Give reasons :
The equilibrium constant for a reaction is one or more if $Δ r G^{o}$ for it is less than zero.

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Solution

$Δ G = Δ H - T Δ S$
For spontaneous reaction, $Δ G = - v e$
Now, $Δ H = - v e$ enothermic
if $Δ s$ is also (-ve) then
$Δ G = (- v e) - T (- v e)$
$Δ G = (- v e) + T Δ S$

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