I have another question similar to this one. I just don't have intuition for why reactions are thermodynamically favorable or unfavorable and I'd like to build it. This time I'd like to ask about the reverse aldol reaction $$\ce{Fructose-1,6-Bisphosphate -> Dihydroxyacetone Phosphate + Glyceraldehyde-3-Phosphate}$$
The standard free energy of this reaction is +23.8 kJ/mol.[1]
I was hoping someone could help me understand why. The larger molecule has lower entropy and charge-charge repulsion. Why is it so thermodynamically unfavorable for it to break apart?
[1] Cornish-Bowden, A. Thermodynamic Aspects of Glycolysis. Biochem. Educ. 1981, 9 (4), 133–137.