The Gibbs free energy of formation at 298K and 760 torr for ZnS(s), ZnO(s), and SO2(g) are: -48.11, -76.06, and -71.75 kJ/mole. Calculate the value of Keq for the reaction: ZnS(s) + O2(g) ---> ZnO(s) + SO2(g)

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