dG = dH - TdS
I don't believe dS is 610 kJ/mol. 610 J/mol perhaps?
dG = 149.8 - (298*0.610)
dG = 0 equil
dG = - spontaneous
dG = + not spontaneous
is Fe3O4 + 4H2 = 3Fe + 4H2O spontaneous at 298 K?
Delta H system= 149.8 kj/mol
Delta S system= 610.0 kj/mol
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