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  4. For the reaction H 2 O ( l ) leftharpoons H 2 O (g) at 373 K and 1 atm pressure

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Q. For the reaction $H _{2} O ( l ) \rightleftharpoons H _{2} O (g)$ at $373 \,K$ and $1$ atm pressure

ManipalManipal 2009Equilibrium

Solution:

$\Delta G=\Delta H-T \cdot \Delta S$
For the reaction,
$H _{2} O (l) \rightleftharpoons H _{2} O (g)$
$\Delta G=0$ (at equilibrium)
$\therefore \Delta H=T \cdot \Delta S$