The final four reactions in glycolysis are given below. the δg of each reaction (under a standard set of conditions) is provided as well. 1,3-bisphosphoglycerate + adp → 3-phosphoglycerate + atp δg = 0.1 kj/mol 3-phosphoglycerate → 2-phosphoglycerate δg = 0.8 kj/mol 2-phosphoglycerate → phosphoenolpyruvate + h2o δg = 1.1 kj/mol phosphoenolpyruvate + adp + h+ → pyruvate + atp δg = -23 kj/mol what is the net change in free energy for the following reaction? 2-phosphoglycerate + adp + h+→ pyruvate + atp + h2o

ΔG = -21.9kJ/mol

Explanation:

It is possible to make an algebraic sum of the ΔG's of the semireactions to obtain ΔG of a reaction.

If semireactions are:

(1) 1,3-Bisphosphoglycerate + ADP → 3-Phosphoglycerate + ATP ΔG = 0.1 kJ/mol

(2) 3-Phosphoglycerate → 2-Phosphoglycerate ΔG = 0.8 kJ/mol

(3) 2-Phosphoglycerate → Phosphoenolpyruvate + H₂O ΔG = 1.1 kJ/mol

(4) Phosphoenolpyruvate + ADP + H⁺ → Pyruvate + ATP ΔG = -23 kJ/mol

The sum of (3) + (4) gives:

2-Phosphoglycerate + ADP + H⁺ → Pyruvate + ATP + H₂O

And the net change in free energy is:

ΔG = 1.1 kJ/mol + (-23kJ/mol) = -21.9kJ/mol

I hope it helps!

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that's what i got you can count the number of atoms