Assume in the last question,  ∆rG°,  K and ∆rH° at 25°C are -70.11kJ/mol, 1.9×1012  and -65.19kJ/mol, respectively (these values may not be the same as your calcualted values), and also  assume that the reaction enthalpy is independent of temperature, using these values given to calculate the equilibrium constant at 670oC.  Please enter your answer using E notation wtih 2 significant figures, such as 2.5E6

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