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(B) The melting of ice is a phase transition process represented as $H_2O(s) \rightleftharpoons H_2O(l)$.For any process,the Gibbs free energy change

Vedclass · Accepted Answer

$\Delta G = +ve$

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(B) The melting of ice is a phase transition process represented as $H_2O(s) \rightleftharpoons H_2O(l)$.For any process,the Gibbs free energy change is given by $\Delta G = \Delta H - T\Delta S$.At temperatures below the melting point ($0\,^{\circ}C$ or $273.15\,K$),the process of melting is non-spontaneous.At $-15\,^{\circ}C$ $(258.15\,K)$,the ice is stable and does not melt spontaneously.Since the process is non-spontaneous at this temperature,$\Delta G$ must be positive $(\Delta G > 0)$.

$\Delta G$ in the process of melting of ice at $-15\,^{\circ}C$ is

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