Calculate the standard free-energy change of the reaction catalysed by the enzyme phosphoglucomutase Glucose-1-P ⇌ Glucose-6-P, given that, starting with 37.06 mM Glucose-1-P and no Glucose-6-P, the final equilibrium mixture at 25oC and pH=7.0 contains 14.42 mM Glucose-6-P and the remaining Glucose-1-P. Give the answer in J/mol.K to one decimal place.

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