Consider the decomposition of yellow mercury(II) oxide. HgO( s , yellow) ⟶ Hg( l ) + (1)/(2)O 2 ( g ) Calculate the standard free energy change at room temperature, ΔG° 298 , using (a) standard free...

Consider the decomposition of yellow mercury(II) oxide.
                            HgO(s, yellow) ⟶ Hg(l) + (1)/(2)O₂(g)
Calculate the standard free energy change at room temperature, ΔG°₂₉₈, using (a) standard free energies of formation and (b) standard enthalpies of formation and standard entropies. Do the results indicate the reaction to be spontaneous or nonspontaneous under standard conditions?