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Gibs free energy *gate question 2014 - Printable Version

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Gibs free energy *gate question 2014 - Sharmin Calcuttawala - 12-22-2015

Triose phosphate isomerase converts dihydroxyacetone phosphate (DHAP)to glyceraldehyde  (G3P) in reversible reaction. At 298 K and pH 7 ,the equilibrium mixture contain 40mM DHAP and 4mM G3P .Assume that the reaction  started with 44 mM DHAP and no G3P .The standard free energy in Kj/mol for formation of G3P is__________...

R=8.314j/mol.k


I'm getting 5.7 


But the ans key is 2.5
So lemme know why the is such a variation ...