The value of Δ G ° ' for the conversion of 3-phosphoglycerate to 2-phosphoglycerate (2PG) is + 4.40 kJ/mol . If the concentration of 3-phosphoglycerate at equilibrium is 2.45 mM , what is the concentration of 2-phosphoglycerate? Assume a temperature of 25.0 ° C .

The concentration of 2-phosphoglycerate is 0.415 mM

Explanation:

Relation between standard Gibbs free energy and equilibrium constant follows:

where,

= Standard Gibbs free energy = +4.40  kJ/mol = 4400 J/mol  (Conversion factor: 1kJ = 1000J)

R = Gas constant =

T = temperature =

Putting values in above equation, we get:

Thus the concentration of 2-phosphoglycerate is 0.415 mM

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