What is the ΔG of ATP hydrolysis?

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Multiple Choice

What is the ΔG of ATP hydrolysis?

ATP hydrolysis releases energy, so the Gibbs free energy change is negative. Under standard biochemical conditions, the standard free energy change for ATP plus water forming ADP and inorganic phosphate is about −30.5 kJ per mole. This negative value reflects that the reaction is exergonic and can power cellular work when coupled to endergonic processes. The other options imply energy input, no energy change, or only a portion of the energy released, which doesn’t match the reality of ATP hydrolysis. In cells the exact ΔG can vary with concentrations, but −30.5 kJ/mol is the conventional reference for the standard value.

ATP hydrolysis releases energy, so the Gibbs free energy change is negative. Under standard biochemical conditions, the standard free energy change for ATP plus water forming ADP and inorganic phosphate is about −30.5 kJ per mole. This negative value reflects that the reaction is exergonic and can power cellular work when coupled to endergonic processes. The other options imply energy input, no energy change, or only a portion of the energy released, which doesn’t match the reality of ATP hydrolysis. In cells the exact ΔG can vary with concentrations, but −30.5 kJ/mol is the conventional reference for the standard value.

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