## Hydrolysis of Acetyl phosphate

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

Jacob Afable 3J
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### Hydrolysis of Acetyl phosphate

Winter 2013 Q2B:

Why do we divide the hydrolysis of ATP by the formation of acetyl phosphate to get the amount of moles of ATP?

Chem_Mod
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### Re: Hydrolysis of Acetyl phosphate

This is done because the hydrolysis of ATP drives the formation of acetyl phosphate. Since the question asks how many moles of ATP need to be hydrolyzed to produce 1 mol acetyl phosphate (but we don't know the stoichiometry, mostly because the reaction pathway is complicated) we use the ratio of $\Delta G$ for each process.