For the hydrolysis of ATP at 25C (298 K) and pH 7, ATP + H 2 O
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For the hydrolysis of ATP at 25°C∆ (298 K) and pH 7, ATP + H2O → ADP + Pi + H+, the standard free energy of hydrolysis (∆G°') is 230.5 kJ mol-1 (27.3 kcal mol-1), and the standard enthalpy change (∆H°') is 220.1 kJ mol-1 (24.8 kcal mol-1). Calculate the standard entropy change (∆S°') for the reaction, in both joules and calories. Why is the positive sign of the answer to be expected in view of the nature of the reaction?
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