9. Calculate delta G(r) for the balanced reaction showing the decomposition of mercury (II) oxide at 298 K.
HgO(s) --> Hg(l) + O2(g)
delta H(f), kJ.mol^-1 = -90.83
S(m), J.K^-1.mol^-1 = 70.29, 76.02, 205.14
(Correct answer is +117.1 kJ/mol)
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