The relationship of free-energy change (?G) to the concentrations of reactants and products is important because it predicts the direction of spontaneous chemical
reactions. In the hydrolysis of ATP to ADP and inorganic phosphate (Pi), the standard free-energy change (?G°) is -7.3 kcal/mole. The free-energy change depends on
concentrations according to the following equation:
$\Delta G = \Delta G^\circ + 0.616 \ln(k)$
In a plant cell, the concentrations of ATP, ADP, and P? are approximately 5, 2, and 10, respectively. What is the delta G (real life) for ATP synthesis in the plant cell? Make sure
to show ALL your work on how you would fill in this equation. (10 pts)
$\ln(1) = 0$
$\ln(0.25) = -1.38$
$\ln(2.4) = 0.875$
$\ln(0.416) = -0.875$
$\ln(4) = 1.38$
$\ln(12) = 2.485$
$\ln(2) = 0.693$
$\ln(0.5) = -0.693$
