Identify the one FALSE statement regarding entropy and Gibbs energy:
A reaction is spontaneous if $\Delta G_{reaction} < 0$.
$\Delta G_{reaction} = T\Delta S_{universe}$.
At the temperature of a phase transition, $\Delta G$ for that phase transition is zero.
$\Delta G_{reaction}^\circ = \Sigma n \Delta G_f^\circ \text{(products)} - \Sigma n \Delta G_f^\circ \text{(reactants)}$.
$\Delta S > 0$ for melting of any substance.