We find the following statement in a chemistry textbook: “At pH7.0 and 0.01 M Mg2+ ion, the standard free-energy change

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We find the following statement in a chemistry textbook: “At
pH7.0 and 0.01 M Mg2+ ion, the standard free-energy
change for ATP hydrolysis (ATP + H2O —> ADP + Pi) is
-28 kJ/mol.” This means that—
at any concentration of the 2 reactants and 2 products the
difference of free energy between the reactants and products is 28
kJ/mol.
when the reaction reaches equilibrium, the free energy of ADP
and Pi is lower by 28 kJ/mol than that of ATP and water.
when the reaction reaches equilibrium, the free energy of ADP
and Pi is higher by 28 kJ/mol than that of ATP and water.
1 mole of ADP and Pi in a one molar solution is lower in free
energy by 28 kJ/mol than 1 mole of ATP and 1 mole of water under
the given set of conditions.
1 mole of ADP and Pi in a one molar solution is higher in free
energy by 28 kJ/mol than 1 mole of ATP and 1 mole of water under
the given set of conditions.