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The ΔG’o for the reaction citrate → isocitrate is + 6.64 kJ/mol. The ΔG’o for the...

The ΔG’o for the reaction citrate → isocitrate is + 6.64 kJ/mol. The ΔG’o for the reaction isocitrate → α-ketoglutarate is – 267 kJ/mol. What is the ΔG’o for the conversion of citrate to α-ketoglutarate at 25oC?

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Answer #1


ΔG = sum of product - sum of reactant

for citrate ----> isocitrate

ΔG = G2-G1 ---> +6.64 = G2-G1          (eq.1)

for isocitrate ----> α-ketoglutarate

ΔG = G3-G2 ----> -267 = G3-G1           (eq.2)

on simplification of eq.1 & eq.2 we get,

for citrate -----> α-ketoglutarate

ΔG = G3-G1 = -267 + 6.64 = -260.36 kJ/mol (exothermic rxn) @ std. condition

this problem can be solved further while equilibrium datas are avail.

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