This is essentially a combustion reaction in which a hydrocarbon such as octane in this case, reacts with oxygen to form carbon dioxide and water. Combustion reactions are exothermic which implies that energy is released as the reaction progresses. Thus, the given reaction can be represented by adding the term 'energy' to the product side of the reaction:
Molar free energy (ΔG) in the transportation of uncharged molecules as glucse through a cell membrane from the exterior to the interior of the cell is defined as:
ΔG = RT ln C in / C out
knowing R is 8,314472 kJ/molK; T is 298K Cin = 200mM and Cout = 20mM