The combustion of glucose to CO 2 and water is a majorsource of energy in aerobi

Question

The combustion of glucose to CO2 and water is a majorsource of energy in aerobic organisms. It is a reaction favoredmainly by a large negative enthalpy change.

6H12O6(S) + 6O2(g)------> 6CO2(g) + 6H2O(l)

DHo = -2816kJ/mol    DSo = +181 J/mol

In the overall reaction of aerobic metabolism of glucose, 32moles of ATP are produced from ADP for every mole of glucoseoxidized. Calculate the standard state free energy change for theoverall reaction when glucose oxidation is coupled to the formationof ATP. (note: DGo ofconverting ADP to ATP is +31 kJ/mol)

(Hint: You make 32 moles of ATP per glucose & need+31 kJ/mol of energy to make each ATP; thus first calculate howmuch energy is needed to make 32 moles of ATP, then add this toyour answer in 1. a) …) (Units =kJ/mol)

Explanation / Answer

Formula: DG0 = DH0 - TDS0 +DG0 (of converting total number of ADP into ATP)                      = {(-2816kJ/mol) - (T/K)*(+0.181kJ/K mol)} + (32*31.kJ/mol)                     =some thing                       In the data the temperature at which the given reaction wasoccuring was not mentioned so that I am unable to calculate theexact value of free energy change for this process. Entropy units must be J/K mol but not simply J/mol         

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