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ATP + H2O <---> ADP + Pi Calculate the ΔG for ATP hydrolysis when the concentrations...

ATP + H2O <---> ADP + Pi

Calculate the ΔG for ATP hydrolysis when the concentrations of ATP, ADP, and Pi are all 1M

R = 1.98 x 10-3

T = 310 kelvin

ΔGº = -30.5 kJ/mol

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Answer #1

Q of reaction = [ADP] [Pi] / [ATP]

= ( 1M) ( 1M) / ( 1M)  

= 1

dG of reaction = dGo + RT ln (Q)

= - 30.5 KJ/mol + ( RT) ln ( 1) ( ln 1 = 0 )

= - 30.5 KJ/mol

Thus dG for ATP hydrolyisis is - 30.5 KJ/mol

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