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For the reaction A(aq) + B(aq) C(aq) + D(aq), the equilibrium constant is 20.7 at 25 o C and 37.0 at 50 o C. What

For the reaction A(aq) + B(aq) <---> C(aq) + D(aq), the equilibrium constant is 20.7 at 25^oC and 37.0 at 50^oC. What is the value of the standard Gibbs free energy change (in kJ) of this reaction at 75^oC?

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