Biochemistry Thermodynamics: Practice Problem 3

ATP hydrolysis at pH 7.0 is accompanied by release of hydrogen ion to the medium

ATP^4- + H_2­O   ↔ ADP^3- + HPO­₄^2- + H⁺

If the ΔG˚’ for this reaction is -30.5 kJ/mol, what is ΔG˚ (that is, the free energy change for the same reaction with all components including H⁺, at a standard state of 1M)?

From GARRETT/GRISHAM. Biochemistry, 4E. © 2009 Brooks/Cole, a part of Cengage Learning, Inc. Reproduced by permission. www.cengage.com/permissions