A direct measurement of the standard free-energy change associated with the hydrolysis of ATP is technically demanding because the minute amount of ATP remaining at equilibrium is difficult to measure accurately. The value of ΔG\'° can be calculated indirectly, however, from the equilibrium constants of two other enzymatic reactions having less favorable equilibrium constants:Keil-270 K. g2=890 glucose 6-phosphate+ H2O → glucose+ P, eq1 ATP + glucose → ADP+ glucose 6-phosphate Using this information for equilibrium constants determined at 25 "C, calculate the standard free energy of hydrolysis of ATP Number kJ/ mol